Cheeseburger Casserole

This wasn't my favorite thing I've ever made, but it wasn't bad. It made 6 servings, with a points value of 5 points per serving.

2 yukon gold potatoes (I couldn't find these, so I used regular old potatoes)
1 pound lean ground beef
1 carrot, chopped
1/2 onion, chopped
1 stalk celery, chopped
1 cup sliced mushrooms
1 clove minced garlic
2 oz. 2% velveeta, cut into chunks
1/4 c. fat free evaporated milk
1/4 tsp red pepper flakes
8 lowfat tortilla chips (I used baked)

1. Peel & slice potatoes & layer in the bottom of a baking dish sprayed with cooking spray. Bake for 15 minutes in a 350 degree oven, then set aside.
2. Meanwhile, chop veggies & cook in skillet with olive oil until tender. Remove and set aside.
3. Next, cook ground beef, then drain. Add veggies and mix all together. Layer on top of potatoes in baking dish.
4. Combine cheese, milk, and pepper flakes & microwave for 1 minute, or until melted & mixed completely. Drizzle over meat & potatoes.
5. Crunch up chips & sprinkle on top.
6. Cook for 25-30 minutes & serve.