Taco Stuffed Jumbo Shells

1 Onion (finely diced)
2 lbs. Ground Beef
1 T. Chili Powder
6 oz. cream cheese
1 cup Taco Sauce
1 ½ cups Shredded Cheese
1 cup crushed Corn Chips
21-24 Jumbo Shells (or wonton wraps)
Optional: Top with sour cream and green onions

Cook shells according to directions, or press wonton wraps in muffin tins. Chop onion and cook with ground beef. Drain Fat. Stir in chili powder, cream cheese, and ½ cup taco sauce. Heat until cheese is melted. Fill shells with mixture. Top each shell with a little more taco sauce. Cover with foil and cook at 350 for 20-30 minutes. Remove foil. Sprinkle with crushed corn chips and cheese and cook an additional 10 minutes. Garnish with sour cream and green onions.