In a large skillet, saute onions in butter until tender. Crumble nine bacon strips; set remaining strips aside. Place the bread crumbs in a greased 9-in. deep-dish pie plate. Layer with half of the tomatoes, onions, crumbled bacon and cheese. Top with the remaining tomatoes, onions and crumbled bacon.
In a bowl, beat the eggs, salt and pepper; pour over the top. Sprinkle with remaining cheese. Top with reserved bacon strips. Arrange additional tomato slices around the edge if desired. Bake at 350° for 35-40 minutes or until a knife inserted in the center comes out clean. Let stand for 10 minutes before cutting. Refrigerate leftovers.