Prep your ingredients by chopping the onion and bell pepper, mincing the garlic, and rinsing the kidney beans.
Layer the ingredients in a large skillet, starting with browning the ground beef for 5-7 minutes.
Add the chopped onion, bell pepper, and minced garlic, sautéing for 3-4 minutes until tender.
Stir in the diced tomatoes, kidney beans, tomato sauce, chili powder, cumin, salt, and pepper.
Add the frozen mixed vegetables, uncooked elbow macaroni, and beef broth, then bring to a boil.
Reduce heat to low, cover, and let simmer for 15-20 minutes until macaroni is tender.
Sprinkle shredded cheddar cheese on top, cover for 5 minutes to melt the cheese.
Serve the Hobo Casserole in bowls and enjoy.