This healthy side dish is full of flavor and brings delight to those who try it. The white sauce with sliced fresh mushrooms, sweet onions and low-fat milk makes a creamy, rich casserole. Ingredients: 3 tablespoons canola oil, divided 1 medium sweet onion, (half diced, half thinly sliced), divided 8 ounces mushrooms, chopped 1 tablespoon […]
