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Export 15 ingredients for grocery delivery
Step 1
Combine all ingredients (for mayo) in food processor and pulse (or blender).
Step 2
Sandwich: Using a pastry brush, brush olive oil on the vegetable slices and the portobello mushrooms.
Step 3
Season them with salt and pepper.
Step 4
Place vegetables on a hot grill (or under broiler) and cook until they are tender.
Step 5
Once vegetables are done brush sliced bread with olive oil and grill (or broil) on both sides.
Step 6
To assemble, slice portobellos into 1/4-inch slices, spread both sides of the grilled bread with herbed mayonnaise and then top with 1 slice each of grilled vegetables and a quarter of the mushrooms, and finish off with lettuce and top with remaining piece of bread.
Step 7
Enjoy!