For added depth of flavor, consider adding herbs like thyme or rosemary when sautéing the mushrooms and onions. For a touch of freshness, stir in some fresh chopped herbs such as parsley or chives just before serving. If you have leftovers, store them in an airtight container in the refrigerator for up to 3-4 days. When reheating, add a splash more vegetable broth or cream to restore creaminess.