Ultimate Veggie Grill Sandwich

1.Preheat a grill pan over medium heat and brush with olive oil.

2.In a bowl, toss the bell pepper, zucchini, red onion, and mushrooms with olive oil, garlic powder, oregano, and paprika until well coated.

3.Grill the seasoned vegetables on the preheated grill pan until they are tender and have grill marks, about 5-7 minutes per side.

4.Spread pesto sauce on 4 slices of bread and mayonnaise on the remaining 4 slices.

5.Divide the grilled vegetables evenly among the pesto-coated bread slices.

6.Sprinkle shredded mozzarella cheese over the vegetables and top with the remaining bread slices.

7.Place the sandwiches on the grill pan and cook until the bread is toasted and the cheese is melted, about 2-3 minutes per side.

8.Remove from the grill, slice in half, and serve hot.