Mediterranean Veggie Sandwiches

3 Large Zucchini cut lengthwise into thick slices
1 Large Red Onion, cut into 6 Thick slices
1/4 cup olive oil divided
1/2 tsp salt, 1/4 tsp pepper
2 cloves garlic, minced
1 tsp grated lemon rind
3/4 cup mayonnaise
1 1/2 loaves ciabatta bread, halved lengthwise
11/2 cups shredded mozzarella chese
18 Large Fresh basil leaves
1 15oz jar roasted red and yellow bell peppers, drained

Preheat broiler.  Brush zucchini and onion with 2 Tbsp oil and sprinkle with salt and pepper on a baking sheet.  Broil veggies 5-6 minutes per side or until charred.  Stir garlic and lemon rind into mayonnaise.  Brush cut sides of bread tops, and assemble sandwiches with charred veggies, basil leaves, and roasted red peppers.