This warm grilled vegetable sandwich is a celebration of vibrant flavors and satisfying textures, all brought together with a bright, zesty aioli. It’s the perfect meal for a casual lunch or a light, delicious dinner that feels special.
Imagine layers of perfectly grilled, slightly smoky vegetables nestled between toasty bread, all elevated by a creamy, nutty, and lemony spread.
Recipe Details
- Flavor Profile: Savory, herbaceous, tangy, nutty, with a hint of sweetness from the grilled vegetables.
- Textures: Tender and slightly charred vegetables, crisp bread, and a smooth, creamy aioli.
- Total Active Time: 30 minutes
- Difficulty: Easy
What You’ll Need
This delightful sandwich hinges on fresh, seasonal vegetables, good quality bread, and a zesty aioli that ties everything together. We’ll be grilling the vegetables to bring out their natural sweetness and then assembling them into a hearty, flavorful sandwich.
Ingredient Notes
- Ciabatta Rolls – A sturdy bread like ciabatta is ideal as it holds up well to grilling and can hold all the delicious fillings without becoming soggy.
- Zucchini – Look for medium-sized zucchini that are firm to the touch.
- Red Onion – Sweet red onions caramelize beautifully when grilled, adding depth of flavor.
- Bell Pepper – Any color of bell pepper will work; red, yellow, or orange will add a lovely sweetness.
- Eggplant – Choose a firm eggplant; Japanese or Italian varieties are great here.
- Olive Oil – A good quality extra virgin olive oil is perfect for brushing the vegetables and bread.
- Garlic – Fresh garlic is key for the aioli, providing a pungent, savory base.
- Mayonnaise – Use your favorite good-quality mayonnaise as the base for the aioli.
- Walnuts – Toasted walnuts add a wonderful nutty depth and texture to the aioli.
- Lemon – Fresh lemon juice and zest are essential for the bright, tangy flavor of the aioli.
- Fresh Parsley – Adds a burst of freshness and a lovely green fleck to the aioli.
- Salt and Black Pepper – To season the vegetables and aioli perfectly.
Add-ins and Substitutions
- Cheese: A slice of fresh mozzarella, provolone, or even a sprinkle of crumbled feta would be a delicious addition. You could also add this before the final grilling of the sandwich.
- Greens: A handful of fresh arugula or spinach added just before serving would provide a peppery or mild fresh contrast.
- Herbs: Fresh basil leaves are a wonderful addition to the grilled vegetables, adding an extra layer of herbaceousness.
- Spicy Kick: A pinch of red pepper flakes added to the aioli or sprinkled over the vegetables before grilling can add a touch of heat.
- Other Vegetables: Feel free to experiment with other sturdy grilling vegetables like asparagus, mushrooms, or even sweet potato slices.
How to Make Warm Grilled Vegetable Sandwich with Lemon Walnut Aioli
Let’s get started on this absolutely mouthwatering sandwich. Our journey begins with prepping and grilling the vegetables to smoky perfection, then whipping up a quick, flavorful aioli.
- Prepare the Vegetables: Start by slicing your zucchini into 1/4 inch rounds. Halve and thinly slice the red onion. Seed and slice the bell pepper into 1/2 inch strips. Slice the eggplant into 1/4 inch rounds.
- Grill the Vegetables: In a large bowl, toss the zucchini, red onion, bell pepper, and eggplant with 1/4 cup of olive oil, salt, and pepper. Heat a grill or grill pan over medium-high heat. Grill the vegetables in batches until tender and nicely charred, about 4 to 6 minutes per side. Remove from the grill and set aside.
- Make the Lemon Walnut Aioli: While the vegetables are grilling, prepare the aioli. In a food processor or blender, combine the mayonnaise, toasted walnuts, minced garlic, lemon juice, lemon zest, and chopped parsley. Process until smooth and well combined. Season with salt and pepper to taste.
- Grill the Bread: Halve the ciabatta rolls horizontally. Brush the cut sides with the remaining 2 tablespoons of olive oil. Place the rolls cut-side down on the grill and toast for 1 to 2 minutes, until lightly golden and warmed through.
- Assemble the Sandwiches: Spread a generous amount of the Lemon Walnut Aioli on the cut sides of both halves of each toasted ciabatta roll. Layer the grilled vegetables onto the bottom halves of the rolls. Place the top halves of the rolls over the vegetables.
- Pro Tip: Don’t overcrowd the grill when cooking the vegetables. Cooking them in batches ensures they get a nice char rather than steaming.
Recipe Tips
- Ensure your grill is properly preheated to medium-high heat for the best char marks and even cooking on your vegetables.
- When toasting the walnuts for the aioli, keep a close eye on them as they can burn quickly. A quick toast in a dry skillet or a few minutes in a warm oven is usually sufficient.
- Taste and adjust the seasoning of both the vegetables and the aioli before assembly. A little more salt or lemon can make a big difference.
- If you don’t have a grill, a grill pan on the stovetop or even roasting the vegetables in the oven at 400 degrees Fahrenheit (200 degrees Celsius) for about 20-25 minutes, until tender and slightly caramelized, will work.
FAQs
- Can I make the aioli ahead of time? Yes, the Lemon Walnut Aioli can be made up to 2 days in advance and stored in an airtight container in the refrigerator. The flavors will meld beautifully, but it’s best to let it come to room temperature for a few minutes before serving.
- What kind of walnuts should I use? Raw walnuts are best, as toasting them yourself before adding them to the aioli will bring out their full flavor and aroma.
- Can I use a different kind of bread? Absolutely! While ciabatta is ideal for its structure, a good quality focaccia or a hearty sourdough would also be delicious. Just ensure it’s sturdy enough.
- Are there any vegetables that don’t grill well for this? Softer vegetables like tomatoes or spinach would become too mushy on the grill. Stick to firmer vegetables that can withstand the heat.
Serving Suggestions
This warm grilled vegetable sandwich is wonderfully satisfying on its own, but it pairs beautifully with a variety of sides. Consider serving it with a light, crisp green salad dressed with a simple vinaigrette, a side of sweet potato fries, or a refreshing cucumber salad. A bowl of creamy tomato soup would also be a delightful accompaniment on a cooler day.
Make This Recipe in Advance
The Lemon Walnut Aioli can be prepared up to 2 days in advance and stored in an airtight container in the refrigerator. The vegetables can also be grilled a few hours ahead of time, then gently reheated before assembling the sandwiches. The ciabatta rolls are best toasted just before serving to ensure they are warm and crisp.
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Warm Grilled Vegetable Sandwich with Lemon Walnut Aioli
- Total Time: 30 minutes
- Yield: 4 sandwiches 1x
Description
This warm grilled vegetable sandwich is a celebration of vibrant flavors and satisfying textures, all brought together with a bright, zesty aioli. It’s the perfect meal for a casual lunch or a light, delicious dinner that feels special. Imagine layers of perfectly grilled, slightly smoky vegetables nestled between toasty bread, all elevated by a creamy, nutty, and lemony spread.
Ingredients
Lemon Walnut Aioli
1 cup California walnuts, toasted
2 tablespoons Dijon mustard
2 tablespoons tahini
2 tablespoons mayonnaise
1 lemon, juiced
Grilled Vegetable Sandwich
1 zucchini, medium, sliced 1/2-inch (1 cm) coins
1 eggplant, small, sliced 1/2-inch (1 cm)
1 orange pepper, sliced in strips
4 tomatoes, small, sliced in half
1 onion, sliced 1/2-inch (1 cm) thick
4 tablespoons olive oil, divided
Salt and pepper
8 slices sourdough bread
1 clove garlic
Handful basil leaves, chiffonade (optional)
Instructions
For the Lemon Walnut Aioli
Combine the toasted walnuts, Dijon mustard, tahini, mayonnaise, and lemon juice in a food processor.
Pulse the mixture until it forms a thick, chunky paste, then set it aside.
For the Grilled Vegetable Sandwich
In a large bowl, toss the zucchini, eggplant, orange pepper, tomatoes, and onion with two tablespoons of olive oil, plus a pinch of salt and pepper.
Grill the seasoned vegetables until they are tender and nicely charred.
Brush both sides of the sourdough bread slices with the remaining olive oil and lightly grill them. Gently rub each warm slice of bread with the garlic clove.
Spread a spoonful of the walnut aioli onto the bread, layer the warm grilled vegetables inside, and top with fresh basil if desired.
Notes
Ensure your grill is properly preheated to medium-high heat for the best char marks and even cooking on your vegetables.
When toasting the walnuts for the aioli, keep a close eye on them as they can burn quickly. A quick toast in a dry skillet or a few minutes in a warm oven is usually sufficient.
Taste and adjust the seasoning of both the vegetables and the aioli before assembly. A little more salt or lemon can make a big difference.
If you don’t have a grill, a grill pan on the stovetop or even roasting the vegetables in the oven at 400 degrees Fahrenheit (200 degrees Celsius) for about 20-25 minutes, until tender and slightly caramelized, will work.
- Prep Time: 30 minutes
- Category: Sandwich
- Cuisine: Mediterranean
