In a skillet over medium heat, brown steak until it reaches 135ºF on an internal meat thermometer for medium-rare doneness. Remove from skillet, and set aside.
In same skillet, add onions, green bell peppers, red bell peppers, salt, pepper and cumin. Sauté about 5 minutes until tender.
Add eggs, and scramble. Return beef to mixture. Heat for 1 minute.
Heat flour tortillas on a hot skillet or griddle. Evenly distribute beef and egg mixture onto flour tortillas, sprinkle with cheese, and roll into burritos. Serve with your favorite salsa.