Taco Mac and Cheese

http://pinterest-yummies.blogspot.com/2013/01/yummy-foods.html 

Taco Macaroni and Cheese... 1 pound macaroni, 1 can black or chili beans, 1 onion, chopped 2 cloves garlic, minced 1 serving of taco seasoning (or 1 packet of store-bought seasoning mix) 1 cup salsa 1 8-ounce package cream cheese, cut into chunks 2 cups milk 1/2 cup sour cream 2 cups shredded Mexican cheese blend