Stuffed Chop Sirloin With Mushroom Sauce = Tip: There are several healthy substitutes to the heavy cream. *Try Greek yogurt to reduce the fat. *Evaporated milk (cold) and vanilla extract to taste. *One cup of skim milk with 2 Tbs corn starch whisked until thick. 3-4 min. *To equal one cup substitute ⅓ cup unsalted melted butter, ¾ cup milk and 1 Tbs flour.