1. Cook ground beef and onion in a large skillet over medium-high heat, stirring often, 6 to 8 minutes or until meat crumbles and is no longer pink; drain. Wipe skillet clean.
2. Combine ground beef mixture, beans, and next 3 ingredients in skillet, and cook 3 to 4 minutes or until thoroughly heated.
3. Prepare Santa Fe rice according to package directions. Stir into beef mixture. Serve with desired toppings.
Note: We tested with Uncle Ben's Ready Whole Grain Medley Santa Fe Rice.