Preheat oven to 425F. Cut off tops of tomatoes and scoop out pulp. Put tomatoes in a greased 8x8 inch baking pan and bake for 5-7min. Mix eggs, onion, green chili, salt, pepper together. Evenly pour eggs into each tomato. Mix cheese, bread crumbs, and cilantro together. Add about 2 tablespoons of cheese mixture to each tomato, and then drizzle with melted butter. Bake for about 20 minutes, until eggs are set.