I’m still trying to help my father-in-law use up his yellow squash, so this week, I decided on a gratin. PrintSquash Gratin Total Time: 45 minutes Yield: Serves 6 Ingredients1 lb yellow (or zucchini) squash 2-4 TBSP extra virgin olive oil 1/4 cup diced onion 1 tsp fresh thyme leaves 1/2 tsp granulated garlic powder…