Mexican Pierogy Casserole

I got my inspiration for this from http://www.pierogy.com/retail/viewrecipes.asp?recipeid=210.

Ingredients:
1 Box Potato & Onion Pierogy thawed
12 oz of your favorite Salsa
1 can of Black Beans
Handful or 2 of cheddar cheese shredded
Crushed Tortillas (I used leftover Hard taco shells)
Dollop of Sour Cream per serving

Heat oven to 350*. In a baking dish mix the first 3 ingredients. Add a layer of crushed tortillas. Top with cheese. Heat approx 15 covered, take off foil and heat until bubbly. Garnish with sour cream when serving.