Preheat the oven to 375 degrees and grease a 9x13 baking pan. Combine Jiffy mix with eggs and milk in a small bowl. In a skillet, cook beef, onion, and pepper until beef is no longer pink; drain fat.
Add Rotel, beans, corn, and taco seasoning. Spread the meat mixture in the pan. Evenly spread cornbread mix on top and bake for about 40 minutes. Serve with favorite toppings after removing from the oven.