Preheat the oven to 350 degrees F. Grease a 9x13- inch baking pan. Bring a large pot of lightly salted water to a rolling boil. Cook the lasagna noodles until tender, but still slightly firm (approximately 10 minutes); drain and set aside. Heat the oil in a large skillet and sauté the onion and garlic until golden. Add chopped eggplant to skillet and cook until very soft and tender. Add chopped spinach to the skillet and cook until wilted. Stir in the tomatoes, marinara, basil, oregano, crushed red pepper flakes, salt and pepper; simmer for 5 minutes. Remove from heat. Layer 3 noodles on bottom of pan. Spread one-third of the ricotta cheese on top of noodles, spoon one-third of sauce on top, and sprinkle with one-third mozzarella and cheddar cheese. Repeat, layering with remaining ingredients, ending with a layer of cheese. Bake 35 minutes or until cheese on top is melted and golden brown. Let casserole rest 10 minutes before cutting.
Buying Kentucky Proud is easy. Look for the label at your grocery store, farmers' market, or roadside stand.