HEAT oven to 350°F.
MICROWAVE tortillas on HIGH 30 sec. Line each of 8 muffin cups with 1 tortilla. Carefully fold back edges of tortillas, leaving opening in centers for filling.
BAKE 10 min. Meanwhile, brown meat in large skillet; drain. Stir in salsa; bring to boil. Simmer on medium-low heat 10 min.
SPOON meat mixture into tortilla bowls; top with remaining ingredients.