Healthy Cheeseburger and Fries Casserole

My kids love this casserole but I hate how fattening it is. I found a wonderful "Healthy"version from
www.domessticated.com

1 pound 96/4 ground beef
1/4 tsp salt and pepper
1/4 tsp garlic powder
1 Tbsp worcestershire sauce
1 can condense cheddar cheese soup
8 Tbsp fat free sour cream
8 oz. frozen french fries
2 oz. 75%  Cabot reduced fat cheddar cheese
Preheat oven, bake french fries on baking sheet for 10 min., while browning ground beef in half of worcestershire sauce. Cook, stirring occasionally. Drain any excess grease and add seasoning, and other half of worcestershire sauce. Return to heat adding condensed cheese soup, and sour cream, heat through. Add to an 8x8 baking dish. Cover with baked french fries. Bake for ten minutes. Remove casserole from oven and sprinkle with cheddar cheese. Bake for 5 more min or until cheese is melted.