In a large saucepan, scramble-fry ground beef with celery, onion & green pepper. Add tomatoes, enchilada sauce, olives salt & pepper; simmer covered for about 15-20 minutes.
Heat oil in skillet. Cut 2 tortillas into quarters; cook remaining 6 tortillas & the quarters in oil till crisp & golden. Drain on paper towels. Set aside quartered tortillas & break up remaining six. In a bowl, combine cheddar, cottage cheese & slightly beaten egg.
Preheat oven to 350 F. In a 9 X 9-inch baking dish, spread 1/3 of meat mixture. Top with 1/2 of the cheese mixture then 1/2 of the BROKEN tortillas. Repeat layers, ending with meat mixture. Top with quartered tortillas.
Bake for 30 minutes then allow to stand 5 minutes before serving.