Cut pork into bit-size pieces (this should make about 2 cups of pork pieces).
In a large skillet combine pork pieces, the salsa, beans and burrito seasoning. Cook and stir over medium heat until heated through.
Meanwhile, wrap tortillas tightly in foil and heat in preheated oven for 10 minutes to soften.
Place 1/2 cup of the meat mixture onto each tortilla, just below the center. Sprinkle with cheese. Fold bottom edge of each tortilla up and over filling. Fold opposite sides in and over filling. Roll up from the bottom. Secure rolled tortillas with wooden toothpicks, if necessary. Place burritos on a baking sheet, seam side down.
Bake in a 350°F oven about 20 minutes or until heated through. Remove and discard toothpicks.
If desired serve with sour cream and additional salsa.