CRUMBLE meat into microwaveable colander; place over microwaveable bowl. Microwave on HIGH 8 min., stirring every 2 min. to break up the meat. Discard fat. Transfer meat to 9-inch microwaveable pie plate; stir in seasoning mix and water. Microwave 5 min., stirring after 3 min.
REMOVE half the meat mixture; cover remaining meat mixture with half the tortillas. Repeat layers of meat mixture and tortillas; top with salsa and cheese. Microwave 4 min.
TOP with remaining ingredients. Cut into wedges to serve.