Scallop Squash & Mushroom Lasagna
1/4 cup (1/2 stick) unsalted butter 2 1/2 cups chopped onions 1/2 pound mixed crimini and oyster mushrooms, sliced (about 3 cups) 1 pounds white scallop or other summer squash, grated 1/2 c vegetable or chicken stock 4 cups basic Read on!