Brown meat in large skillet; drain. Return meat to skillet. Stir in salsa and seasoning mix; simmer on medium-low heat 10 min., stirring occasionally.
Spread 1/2 cup meat mixture onto bottom of 8-square baking dish sprayed with cooking spray; cover with 2 tortillas.
Top with layers of 1/2 cup of the remaining meat mixture, half the beans, 1/2 cup cheese and 2 of the remaining tortillas; repeat layers. Top with remaining meat mixture and cheese; cover.
Bake 30 min.; uncover. Let stand 5 min. before serving.