This recipe was great! I used whole wheat shells instead of elbow/penne. Another change I made was to use 3/4 cup cottage cheese and 1/4 cup crumbled goat cheese. It gave it a great richness and creaminess, and wasn't overwhelming in terms of flavor. Finally, I baked some sliced tomatoes into the top, and sprinkled the bread crumbs on/around them.
The spinach seemed a bit overkill. Next time I will use half and add some broccoli. I used the nutmeg and did not mind it. I may add more paprika next time to give it a bit more of a kick!