HEAT oven to 400ºF.
COOK meat with Taco Seasoning Mix as directed on package.
PLACE 5 Tortillas on baking sheet. Spread each with 1 Tbsp. beans; top with 1/4 cup seasoned meat and 1 Tbsp. cheese. Cover each with second tortilla and additional layers of beans, meat and cheese; top with tomatoes.
BAKE 8 to 10 min. or until pizzas are heated through and cheese is melted. Top with Salsa and sour cream.