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Today I’m sharing a Weight Watchers Recipe for Grilled Marinated Flank Steak. Many Weight Watchers avoid eating steak even though they love it. But it’s not necessary. You just need to choose the right steak.
Like this light and lean low-carb Weight Watchers Grilled Flank Steak with Onions, which comes from one of my favorite Weight Watchers cookbooks right now – Weight Watchers Family Meals: 250 Recipes for Bringing Family, Friends, and Food Together (affiliate link).

Recipe Notes
A simple marinade of vinegar, olive oil, garlic and oregano combine to add wonderful flavor to this flank steak.
Serve it with grilled red onion, or choose whatever vegetables you like best. Grilled asparagus, red bell pepper, tomato and/or whole grilled scallions would all be delicious.

How Many Calories and WW Points in Marinated Grilled Flank Steak?
According to my calculations, each serving has about 195 calories.
To see your WW Points for this recipe, track it in the WW App!
(You must be logged into WW on a smartphone or tablet.)
4 SmartPoints (Green plan)
4 SmartPoints (Blue plan)
4 SmartPoints (Purple plan)
4 PointsPlus (Old plan)

Substitutions and Variations
Vegetarian – substitute portobello mushrooms or eggplant for the steak.
Different meat – try boneless, skinless chicken breasts or thighs, pork chops or pork tenderloin.
Different vinegar – balsamic or sherry vinegar would work.
Different vegetables – how about zucchini, bell pepper, tomatoes, whole scallion.
If you liked this easy recipe for grilled flank steak, be sure to check out my other easy, healthy Weight Watchers friendly recipes including Steak Fajitas, Savory Slow Cooker Round Steak, Beef with Broccoli, Slow Cooker Balsamic Braised Beef and CrockPot Pepper Steak
If you’ve made this Grilled Marinated Flank Steak, please give the recipe a star rating below and leave a comment letting me know how you liked it. And stay in touch on Pinterest, Facebook, Instagram and Twitter for the latest updates.

Weight Watchers Grilled Marinated Flank Steak Recipe
Equipment
Ingredients
- 3 tablepoons red wine vinegar
- 1 tablespoon olive oil
- 2 teaspoons dried oregano
- 1 large clove garlic, minced
- 1/4 teaspoon black pepper
- 1-1/2 pounds lean flank steak, trimmed of excess fat
- 1 teaspoon salt
- 1 large red onion, peeled and sliced into 1/4-inch thick rounds
Instructions
- In a large Ziploc bag, combine the vinegar, oil, oregano, garlic and pepper. Add the steak and seal the bag, squeezing out as much extra air as you can. Turn and squish the bag to coat the steak with the marinade. Refrigerate at least 1 hour and up to 4 hours. Turn the bag occasionally if you can.
- When you are ready to cook the steak, preheat your grill with medium-high heat.
- Remove the steak from the marinade and discard the marinade. Sprinkle the steak with 3/4 teaspoon salt. Spray the onion with olive oil non-stick spray and sprinkle with the remaining 1/4 teaspoon salt.
- Grill the steak about 6 minutes and then turn it over. Continue to grill until an instant read thermometer inserted into the side of the steak reads 145F degrees, about 6 more minutes.
- Transfer the steak to a cutting board (affiliate link). Cover with foil to retain heat and let it rest about 10 minutes.
- While the steak is resting, grill the onions, turning occasionally, until they are tender, about 8 or so minutes.
- Thinly slice the steak against the grain into 18 slices and place on a serving platter. Top with the onions.
Notes
(Must be logged into WW on a smartphone or tablet.) 4 SmartPoints (Green plan) 4 SmartPoints (Blue plan) 4 SmartPoints (Purple plan) 4 PointsPlus (Old plan) Substitutions and Variations:
- Vegetarian – substitute portobello mushrooms or eggplant for the steak.
- Different meat – try boneless, skinless chicken breasts or thighs, pork chops or pork tenderloin.
- Different vinegar – balsamic or sherry vinegar would work well.
- Different vegetables – how about zucchini, bell peppers, tomatoes, whole scallions.
Nutrition
Nutrition information is automatically calculated, so should only be used as an approximation.
Source: Weight Watchers Family Meals: 250 Recipes for Bringing Family, Friends, and Food Together (affiliate link)
More Lightened Up Steak Recipes
- Balsamic Flank Steak with Roasted Tomatoes (Slender Kitchen)
- Grilled Balsamic Flank Steak (Pointless Meals)
- Grilled Flank Steak with Asparagus and Onions (LaaLoosh)
- Grilled Flank Steak with Chimichurri (SkinnyTaste)
- Skinny Sizzling Flank Steak with Citrus Salsa (Skinny Kitchen)
- Southwest Flank Steak with Peach Salsa (Eat Yourself Skinny)
- Spinach and Feta Stuffed Flank Steak (Emily Bites)
Check out this great video where Weight Watchers shares more ideas for light and healthy grilling…





Hello,
Would this work in an air fryer?
Hi Nancy, I’ve never tried it the an air fryer. Would love to know how it turns out for you. ~Martha
Martha, how do you think apple cider vinegar would work with this recipe?
Thanks for sharing this easy recipe for grilled flank steak. It seems to be very delicious.