1 1/2 lb. lean ground beef
6 corn tortillas
2 c. grated cheese (reg. or low-fat)
1 c. light sour cream
1 c. pitted black olives

Generously spray casserole dish with lo-cal cooking spray. Line bottom with 3 tortillas. Sprinkle with 1/3 of cheese. Top with 1/2 of the cooked (drained of grease) ground beef. Sprinkle with olives (10-15) and a few dollops of sour cream. Repeat layer. Bake 45 minutes at 350 degrees. Remove from oven. Top with 1 cup shredded lettuce and a little of the cheese, olives and sour cream to garnish.