Cook bacon in an iron skillet until it is crisp. I used almost a whole pound. Why not? Set aside when done and sauté onion and green pepper .... yes, in the bacon grease. When your veggies are translucent spoon them out and put them in a baking dish - about 9x9 inches. Crumble the bacon on top. Layer with shredded cheddar cheese. In a bowl mix together 1/2 cup of buttermilk baking mix (although next time I am trying 3/4 of a cup) and 6 eggs. Pour over your ingredients that are in your baking dish.
Bake @ 400 for about 30 minutes, or until your fork comes out clean from the center. I cooked it the night before and had a bit for dinner. It was actually better the next morning as it seemed to firm up.