Grilled Vegetable and Mozzarella Panini

Preparation

1. Whisk vinegar, oil, salt and pepper in a bowl. Coat a baking sheet with cooking spray; place vegetables in 1 layer on sheet. Brush both sides of eggplant and zucchini with vinegar mixture. Spray all vegetables with cooking spray and place under broiler, 7 to 8 minutes, turning once and coating with cooking spray. Lightly brush bottom slices of ciabatta with remaining vinegar mixture. Pile veggies, cheese and basil on 4 slices of bread. Close sandwiches; spray both sides with cooking spray. Heat a medium nonstick skillet over medium-high heat; add sandwiches. Place a second skillet on top of sandwiches and press down. Cook 4 minutes, flipping once. Serve.