Grilled Vegetable Sandwich - cooking recipe

Ingredients

6 Tbsp. mayonnaise
1/2 tsp. chopped fresh parsley
pinch of dried oregano
salt
1 red bell pepper
1 small zucchini
1 yellow summer squash
1/4 eggplant
1/4 c. olive oil
2 sourdough French rolls
1 Tbsp. fresh grated Parmesan cheese
6 to 8 separated onion ring slices (2 whole slices)
3 to 4 slices tomato (1 medium tomato)
2 leaves red leaf lettuce

Preparation

Preheat the barbecue or stovetop grill.