Tacos in Pasta Shells

We love Mexican food at my house. Brent could easily eat tacos every day. So when I found this recipe, I instantly added it to my weekly menu plan. I made several changes to the original recipe, many of them came from the comments posted to the recipe. I love that aspect of All Recipes' website, reading people's feedback and suggestions is the best part of online recipe searching.
These tacos reheated great and tasted even better the next day!

Adapted from: All Recipes

Ingredients:

1 1/2 pounds lean ground beef
1 onion, diced
4 oz. reduced fat cream cheese
1 package taco seasoning
1 4 oz. can chopped green chiles
1 teaspoon salt
Chili powder to taste
30 jumbo pasta shells
2 tablespoons butter, melted
2 cups taco sauce
1 cup shredded Cheddar cheese
1 cup shredded Monterey Jack cheese

Directions:

In a large skillet over medium heat, saute the onion until translucent, then brown beef until no longer pink; drain. Add cream cheese, taco seasoning, green chiles, salt and chili powder; mix and simmer for 5 minutes.
Meanwhile, bring a large pot of lightly salted water to a boil. Add pasta and cook for 8 to 10 minutes or until al dente; drain. Toss cooked shells in butter.
Preheat oven to 350 degrees F
Fill shells with beef mixture and arrange in a 9x13 inch baking dish; pour taco sauce over shells. Cover with foil and bake in preheated oven for 15 minutes.
Remove dish from oven and top with the cheese, return dish to oven to cook for 15 minutes more.
Garnish as desired.