Creamy Mexican Noodles

I originally found this recipe on foodgawker.com from Annie's Eats. It's quick and easy and yummy. Below is her original recipe and what I did.

Ingredients:
1¼ lbs. ground turkey (I used beef)
8 oz. dry pasta shapes
1 small onion, chopped
1 clove garlic, minced
1 (14 oz.) can diced tomatoes, drained
4 tbsp. taco seasoning (I only used 3 1/2 T., I was worried it would be too salty if I put it all in. I thought this was enough seasoning.)
3 oz. cream cheese
½ cup sour cream
Salt and pepper
Shredded cheddar cheese, optional (I topped each serving with cheese.)

Directions:
Bring a large pot of water to boil. Cook pasta according to the package directions. Drain, reserving ½ cup of pasta water. Set aside.

Meanwhile, in a large skillet or sauté pan, cook the ground turkey over medium-high heat until no longer pink. A few minutes before the turkey is cooked through, add the chopped onion to the skillet. Once the turkey is cooked through, mix in the garlic and cook until fragrant, about 30 seconds. Mix in the diced tomatoes and taco seasoning and let simmer over medium heat for about 5 minutes. Stir in the cooked pasta, cream cheese, sour cream and reserved pasta water, and continue stirring until the cream cheese is melted and the sauce is well blended. Season with salt and pepper to taste. Simmer over medium-low heat 3-5 minutes to reduce the sauce a bit. Remove from the heat and top with shredded cheddar cheese, if desired.