Roast some acorn squash according to directions in the Roasted acorn Squash post. While the squash is cooking, prepare your stuffing.
Depending on the size of your squash you’ll want between 2 to 3 cups stuffing.
In a skillet, sauté 1 to 2 cups mixed diced vegetables, such as onion, garlic, celery, peppers, zucchini, mushrooms, spinach, practically anything. This is a perfect use for leftover veggies.
Add ½ to 1 cup cooked white or brown rice.
Next, add ½ to 1cup cooked protein to the mix. Examples are any kind of sausage, hamburger, chicken, or soy-based vegetable crumbles. Yet, another use for leftovers.
Lastly, add optional goodies to customize your dish. You could add cheese (parmesan, mozzarella, feta, pepper jack), some crunch (nuts, sunflower seeds, pepitas), fresh herbs, dried fruit (raisins, cranberries, apricots).
Stir it all together in the skillet. When the squash is cooked, mound the filling over the squash and return to the oven for 10 minutes.