Spice up your stuffed bell peppers with a Tex-Mex twist. Using a food processor, you can quickly chop the ingredients for the filling, which includes ground beef, rice, black beans, corn, onions, and Tex-Mex spices. The bell peppers are stuffed with the mixture and baked until tender. Top them with shredded cheese, guacamole, and salsa for a Tex-Mex feast.