01 -
In a large skillet, brown ground beef over medium-high heat, then drain any excess fat. Add chopped onion and bell pepper, sautéing until softened. Stir in minced garlic for one minute until fragrant, avoiding burning it.
02 -
Return beef to skillet. Stir in tomato paste, Worcestershire, beef broth, and diced tomatoes. Add chili powder, ground cumin, salt, and black pepper. Mix everything well to incorporate the delicious flavors into your Slow Cooker Cowboy Casserole base.
03 -
Bring the mixture to a gentle simmer on the stovetop, allowing the flavors to meld for about 5 minutes. Carefully transfer this hearty mixture into your slow cooker, making sure it's evenly distributed for optimal cooking.
04 -
Cover your slow cooker and cook on low for 6-8 hours, or on high for 3-4 hours, until the Slow Cooker Cowboy Casserole is thoroughly heated and the sauce has thickened beautifully. This long cook time develops rich flavors.
05 -
Once cooked, stir in the rinsed and drained kidney and black beans, along with the frozen corn. Cover and continue cooking for an additional 30 minutes, allowing the beans and corn to heat through completely.
06 -
Sprinkle the shredded sharp cheddar cheese evenly over the top of the Slow Cooker Cowboy Casserole. Cover for 10-15 minutes until the cheese is melted and bubbly. Garnish with fresh green onions and serve this comforting meal.