Flank Steak with Mushrooms

This flank steak is marinated a delicious mixture
and served with sautéed mushrooms.




  • 1 1/2 to 2 pounds/700 to 900 g flank steak
  • 1/2 pound/225 g portobello mushrooms
  • 1/2 pound/225 g cremini mushrooms
  • 1 large shallot
  • 1/4 cup/60 ml butter
  • 2 scallions (green tops only)
  • 1/2 cup/120 ml balsamic vinegar
  • 1/4 cup/60 mL soy sauce, plus 1 tablespoon/15 mL soy sauce
  • 1/4 cup/60 mL olive oil
  • 3 tablespoons/45 mL sugar
  • Salt to taste
  • Black pepper to taste




  1. Season steak with salt and pepper.
  2. Combine 1/2 shallot, 1/4 cup balsamic vinegar, 2 tablespoons of olive oil, 1 tablespoon of sugar, and 2 tablespoons of soy sauce in a resealable bag. Mix well. Add steaks and let sit for 2 hours or more.
  3. Cut portobello mushrooms in half then cut mushrooms (portobello and cremini) into 1/4 inch slices.
  4. Cut remaining half of shallot and scallion tops into 1/2 pieces. In a skillet melt 1/2 of the butter and add 1/2 of the shallots.
  5. Heat 1 tablespoon olive oil over medium for 1 minute. Add portobellos and season with salt and pepper. Simmer for 8 minutes and transfer to a bowl and keep warm.
  6. Repeat process with the cremini mushrooms except reduce the cooking time to 6 minutes. Add portobello pieces and keep warm.
  7. In a small bowl mix 2 tablespoons of sugar, 3 tablespoons of soy sauce and 1/4 cup of balsamic vinegar. Add to mushrooms and boil for 3 minutes or until the liquid is slightly reduced. Add scallions.
  8. Preheat grill.
  9. Remove steaks from bag and dispose of marinade.
  10. Grill steaks until done, about 8-10 minutes per side. Remove from grill and cut into strips cross grain. Serve with mushrooms.

by: Derrick Riches

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