Taco Pasta Shells

Ingredients:

1 12-ounce package dried jumbo macaroni shells
2½ pounds ground beef
6 ounces cream cheese, cut into pieces
2 teaspoons chili powder
2 16-ounce jar of pasta
1¾ cups shredded cheddar or Mexican cheese
Various taco toppings

Directions:

Preheat oven to 350 degrees.
Cook shells according to package directions; […]