Fixed this tonight and it was a winner. It was simple & tasty, so even though I don't really like using prepared taco mix & salad dressing, it's nice to know this works for evenings when I'm looking for something easy.
Layered Enchilada Bake
1 lb. lean ground beef
1 large onion, chopped
2 cups salsa
1 can (15 oz.) black beans, drained, rinsed
1/4 cup Italian dressing
2 Tbsp. taco seasoning mix
6 flour tortillas
1 cup sour cream
1 pkg. (8 oz.) shredded cheese
Preheat oven to 400ºF.
Brown meat with onions in large skillet on medium-high heat; drain. Add salsa, beans, dressing and seasoning mix; mix well.
Arrange tortillas in single layer on bottom of 13x9-inch baking dish; cover with layers of half each of the meat mixture, sour cream and cheese. Repeat all layers.
Bake for 30 - 40 minutes or until casserole is heated through and cheese is melted. Let stand 5 min. before cutting to serve.