Heat a non-stick skillet over medium-high heat. Cook and stir ground beef, onion and bell pepper until beef is browned and onion is translucent, about 5 minutes. Stir in cumin and chili powder. Remove mixture from pan with a slotted spoon and set aside.
In same skillet, prepare Knorr(R) Rice SidesTM- Beef flavor according to package directions.
Stir pinto beans and seasoned beef mixture into the rice; continue cooking until thoroughly heated, about 2 minutes. Reduce heat to low.
Top with Cheddar cheese and continue cooking until cheese melts. Serve with sour cream and any additional favorite toppings.
