macaroni and cheese

This is adapted from Fix It and Forget It - someone referred to the mac & cheese recipe in this cookbook in another thread - so sorry; I don't remember who it was! But it inspired me to try it and I did, but with significant adaptations. It was SO GOOD I wanted to share it.

This serves 3-4 imo. It was enough for ds and me (I had 2 good servings) with lots left over.

4 oz. whole wheat macaroni elbows, cooked al dente
2 1/2 cups shredded medium or sharp cheddar
1/4-1/3 cup plain yogurt
3/4 cup milk (I used organic, 1%, lactose free)
1 egg
1/4 tsp. dry mustard
1/2 tsp. salt
1/8 tsp. pepper

Grease slow cooker with butter; mix all ingredients together reserving 3/4 cup cheese. Sprinkle the remaining 3/4 cup over the macaroni mixture, cover and cook on low 3-4 hours without raising the lid or stirring. I started my crockpot on high for maybe 30 min., then turned it to low - it was ready in 2.5-3 hours and had nice brown edges.