Firehouse Chili and Cornbread Casserole
Personally, I go for the 85:15 lean-to-fat ratio for ground beef, but even something a little leaner would work here.
You can use any green pepper you like. You can use fire-roasted diced tomatoes with or without diced green chiles.
This recipe may make more than what fits into your baking dish, so reserve any leftovers for another use.