Heat oil in a large frying pan over medium-high heat. Add brown onion, capsicum and garlic. Cook, stirring, for 2 minutes or until slightly softened. Add beef. Cook, breaking up with a wooden spoon, for 5 minutes or until browned and cooked through.
Add beans, corn and seasoning. Cook, stirring, for 1 minute or until fragrant. Add sauce and spring onion. Cook, stirring, for 2 minutes or until heated through. Season with salt and pepper.
Meanwhile, cook rice following packet directions.
Heat tortillas following packet directions. Place tortillas on a flat surface. Divide beef mixture along the centre of each tortilla. Top evenly with rice and Mexican Style cheese. Roll up tightly to enclose filling. Wrap burritos in foil. Bake for 5 minutes or until cheese melts. Serve the burritos with sour cream and lime wedges.