Summer Eggplant Tomato Onion Pie Stacey shares her recipe for simple and rustic Eggplant, Tomato, and Onion Pie. It's healthy, quick, easy, highly customizable, and takes advantage of some great summer veggies. Serves 4-6 1 large eggplant 6 Roma tomatoes, sliced into half-inch rounds 1 medium red onion, diced 2 cloves garlic, chopped 1 cup panko breadcrumbs 1/4 cup grated parmesan cheese 1 egg 3 tablespoons butter, melted 1 tablespoon prepared pesto 4 ounces mozzarella cheese, shredded Fresh chopped, flat-leafed, Italian parsley Salt and pepper to taste