Warm a large pot on medium heat. Add diced onions and minced garlic. Allow to cook for 1-2 minutes then add in ground beef. Cook and crumble until fully cooked.
Drain fat then cooking in taco seasoning, rice, corn, and Rotel. Mix together well then add in broth. Bring to a boil then reduce and allow to cook for 5 minutes.
Remove from heat and add in 1 1/2 cup shredded cheese and mix well. Add remaining cheese to the top of the casserole and cover with a lid. Allow to set for 5 minutes for cheese to melt.
Optional: I garnished mine with fresh dice cilantro