Season the ground beef in a skillet. Cook the ground beef over medium-high heat. Using a large spoon or spatula, break down the ground beef into smaller pieces as it cooks. Cook until browned.
Remove the ground beef from the skillet and store on a plate.
Add the onions and garlic to the skillet. Cook until fragrant.
Add the sweet potatoes and peppers. Cook until the vegetables are soft.
Add the Rotel tomatoes and black beans. Stir/mix well.
Add the ground beef back to the skillet and stir.
Top with cheese and enchilada sauce. Allow the dish to cook for 3-5 minutes.
Sprinkle avocado slices and cilantro over the top. Serve!