Beef Rigatoni (Slow Cooker)

1 lb Ground Beef
1/2 C. Onion, chopped
2 Stalks Celery, Sliced thin
1/4 tsp Garlic Powder
1/8 tsp. Red Pepper Flakes
1/4 tsp. dried Thyme
1/4 tsp Salt
1/4 tsp Pepper
1 (10oz) Can condensed Tomato Soup
1/2 C. Beef Broth
1/1/2 Tbs. Worchestershire Sauce
1 C. Uncooked Rigatoni
1 C. Cheddar Cheese, grated

In skillet, brown ground beef, onion & celery. Drain and add in slow cooker. Cook pasta according to package directions. Drain and add to slow cooker. Add remaining ingredients, EXCEPT cheese. Stir and cook on low for 6 hours or high for 3 hours. Stir in cheese and cook for 5 minutes more intil cheese is melted.