This tomato and egg casserole is a simple and delicious dish that is perfect for breakfast or brunch. Ripe tomatoes are sliced and layered with beaten eggs, sautéed onions, and a sprinkle of cheese. The casserole is then baked until the eggs are set and the cheese is melted and bubbly. The combination of the juicy tomatoes, fluffy eggs, and melted cheese creates a flavorful and satisfying dish that is perfect for a lazy weekend morning. Serve it with a side of toast or fresh fruit for a complete and balanced meal. This casserole is a great way to use up an abundance of fresh tomatoes from your garden or local farmers market.