Italian Marinated Flank Steak - cooking recipe

Ingredients

2 tablespoons Italian salad dressing mix (Wildtree Italian Salad Dressing Mix)
1/4 cup red wine vinegar
2 -3 tablespoons roasted garlic grapeseed oil
1 teaspoon Dijon mustard
2 lbs beef flank steak
1 medium red bell pepper (sliced into thin strips )
1 medium green bell pepper (sliced into thin strips )
1/2 large onion (sliced into strips)

Preparation

Combine all ingredients in a freezer bag. Remove air and either marinate 2 hours or freeze.
Defrost bag in fridge. Preheat gas grill to high heat. Grill steak 6 to 7 minutes per side (or broil in oven).
Remove steak from grill and let rest 5 minutes before slicing to preserve juices.
While steak is cooking, cook peppers and onions in remaining dressing in a large skillet until tender.
Thinly slice meat on an angle, cutting across the grain. Serve with sauteed peppers and onions.