Crockpot Mac and Cheese

This recipe is from about.com. I haven't tried it yet, but am placing it here for safekeeping. Here are the original notes: "This delicious comforting version of macaroni and cheese cooks in your crockpot - yes, even the pasta! You need to watch the timing for this recipe carefully; don't make it and then leave the house for hours. Every crockpot cooks a little bit differently."

• Ready In: 4 hrs 10 mins
• Serves: 6

Ingredients

• 1 (10 ounce) container  refrigerated alfredo sauce
• 12  ounces evaporated milk
• 1 1⁄3 cups  whole milk
• 1  egg
• 2  tablespoons Dijon mustard
• 1⁄2 lb macaroni noodles
• 2  cups  shredded cheddar cheese
• 2  cups  shredded American cheese
• 1⁄4 cup  grated parmesan cheese
• 3  tablespoons butter, melted
• 1⁄8 teaspoon white pepper
• 1⁄2 teaspoon onion powder
• 1⁄8 teaspoon garlic powder
• 1⁄2 teaspoon salt

Directions

1. Spray the inside of the slow cooker with nonstick cooking spray. In a large bowl, beat Alfredo sauce with the fresh and evaporated milks, egg, and mustard. Stir in UNCOOKED macaroni and all of the shredded cheeses, butter, pepper, onion and garlic powders, and salt; mix well.
2. Pour into 4 quart crockpot. Cover and cook on low for 3 to 4 hours; test to make sure macaroni is cooked. Do NOT stir or remove the lid while this dish is cooking.