Brown hamburger; drain. Add the salsa, cooking until excess liquid evaporates. Cool. Heat oven to 400 degrees. Roll each crust from 1 package of refrigerated pie crust into a 12-inch circle. Place one circle on a cookie sheet. Spoon beef evenly on circle, leaving a 3/4-inch border. Sprinkle cheese on top of hamburger. Moisten edge of circle with water. Fold second crust in half, cut two 1-inch diagonal slashes in center. Unfold over filling. Press edge of pie to seal. Bake 25 to 30 minutes, or until lightly browned.