Season ground beef with salt and pepper if desired. Heat large deep nonstick skillet over medium-high heat and cook ground beef, onion and green pepper until beef is browned, about 5 minutes.
Stir in chili powder and cook, stirring, until fragrant, about 30 seconds, Add water, beans and tomatoes and bring to a boil over medium-high heat.
Stir in Knorr(R) Rice Sides(TM) - Rice Pilaf; reduce heat and simmer covered, stirring occasionally, until rice is tender, about 7 minutes. Serve, if desired, with shredded Monterey Jack, Pepper Jack or Mexican blend cheese and corn bread.