A Portobello mushroom is a decent swap for a burger, but what about a steak replacement? A halibut steak is a good choice because its firm, flaky meat holds up well no matter how you cook it, even on the grill. It also has a sweet, mild flavor so you can dress it with a variety of marinades or rubs. Halibut is low in saturated fat and a good source of omega-3 fatty acids, vitamins B6 and B12, magnesium, phosphorus and potassium.
Calorie savings: A standard skirt steak has 370 calories 6 ounce serving. Even with the visible fat trimmed, about 50 percent of the steak's calories come from fat. A sirloin cut has even more fat and calories per serving (Not true for ribeye; it has 318 cal per 6 oz) A 4-ounce filet of halibut has about 160 calories and 1 gram of heart-healthy fat.