Mexican Lasagna - cooking recipe

Ingredients

cooking oil spray
5 large 10-inch flour tortillas
1 (15 oz.) can black beans
1 (15 oz.) can yellow corn
1 lb. ground beef. cooked and drained
1 small can sliced olives
1 (14.5 oz.) can diced tomatoes with mild green chili
1 (15 oz.) large can tomato sauce
1 1/2 tsp. chili powder
1 tsp. ground cumin
1 tsp. garlic powder
1 tsp. sugar
1 large egg
16 oz. regular sour cream (note)
2 c. shredded Jack cheese, divided
1/2 c. chopped green onion

Preparation

Note:
Do not use light or fat-free sour cream because it will curdle during baking.
Shredded cooked chicken can be used instead of ground beef.