1 c. lentils, rinse and drained
2 c. water
1 lb. ground beef
1 (15 oz.) can tomato sauce
1 env. dry onion soup mix
1 tbsp. chili powder
1 1/2 tsp. ground cumin
1/2 tsp. crushed red pepper flakes
12 taco shells
Shredded lettuce
Shredded Cheddar cheese