Southwestern Lasagna

Ingredients (13)

• 1-1/2 pounds ground beef
• 1 medium onion, chopped
• 1 can (15 ounces) enchilada sauce
• 1 can (14-1/2 ounces) diced tomatoes, undrained
• 1 can (2-1/4 ounces) sliced ripe olives, drained
• 1 teaspoon salt
• 1/4 teaspoon garlic powder
• 1/4 teaspoon pepper
• 1 cup 4% cottage cheese
• 1 large egg
• 1/2 pound Monterey Jack cheese, thinly sliced
• 8 corn tortillas (8 inches), halved
• 1/2 cup shredded cheddar cheese