Tomato-Onion Casserole - Red onion slices become sweet and tender when baked in a 450-degree oven with juicy tomatoes. This easy casserole is good warm or at room temperature, and makes a great companion to any grilled meat.
Sweet Onion Casserole -- or my cousin's recipe --2 large Vidalia onions sliced and separated. salt , pepper, 1 can cream of chicken soup (dilute it a little bit) mix all together to coat onions with soup. Cover and bake about 30 min or until onions are tender. Sprinkle heavily with parmesan cheese panko bread crumbs and ritz cracker crumbs. Bake until browned.