My mother loved gratins, and leftover meat and cold cuts always found their way into our pasta, usually along with zucchini or peas. I have made gratins for my family through the years. The gratin can be made ahead, sprinkled with Parmesan, and kept, covered, at room temperature for a few hours or refrigerated for up to a day before it is finished in the oven. If refrigerated, bring back to room temperature and bake on a cookie sheet for about 30 minutes in a 425-degree oven until heated through and lightly browned on top. Do not try to keep the cooked gratin in a warm oven for more than 10 to 15 minutes, or the pasta will swell up in the liquid and become gooey.

This pasta casserole is a hearty yet elegant combination of whole wheat penne, rich butternut squash, toasted walnuts, ricotta and Parmesan cheese.
POINTS® Value: 5
Level of Difficulty: Moderate
*Look for a 20 ounce bag of fresh, already peeled and cubed squash from your supermarket. If you can’t find any, cut a medium squash in half lengthwise and place cut-side down on prepared baking sheet; roast until tender, about 45 minutes. Scoop squash out of skin into a large bowl, mash with a spoon and proceed as above.

Alternatively, you can microwave cubed squash, covered, in a shallow microwave-safe baking dish or container with 1/4 cup of water, until cooked through; mash squash in a bowl.