Mushrooms Meaty and filling, as a stand-in for beef they can slash up to 400 calories from a meal. They may also protect against breast cancer by helping to regulate a woman’s estrogen levels. Barley Another high-fiber cholesterol fighter. On weeknights use the pearl or quick-cooking variety. More time? Give hulled barley, with its extra layer of bran, a go. Walnuts A surprisingly good source of omega-3 fatty acids. Those are the fats that lower the bad-for-you cholesterol (L