Place a large, rimmed, nonstick baking sheet in oven. Preheat to 425 degrees F.
2
Carefully remove warmed baking sheet from oven; coat with cooking spray. Place squash and potatoes on prepared bakig sheet and sprinkle with salt and pepper; toss to coat. Roast, tossing about halfway through cooking, until squash and potatoes are tender and slightly browned, about 35 - 40 minutes.
3
Meanwhile after vegetables have cooked for about 20 minutes, place butter in a small saucepan (the smaller the better); set pan over medium-low heat. Let butter sit until it melts; continue to cook butter until it foams. Start swirling pan and continue to cook butter until foam subsides and milk solids brown. The ubtter will have a nutty smell - be careful not to cook it too long or it can burn. Remove pan from heat and immediately crumble sage into butter (be careful, the butter will bubble).
4
Transfer squash and potatoes to a serving platter or bowl; drizzle with hot butter mixture and toss to coat. Yields about 3/4 cup per serving.
