Combine Custom Culinary® Gold Label True Foundations™ Beef Liquid Stock Concentrate, olive oil, red wine vinegar, garlic, ginger and green onion with hanger steaks. Let marinate overnight.
Remove hanger steaks from marinade. Season with salt and pepper, then grill to medium rare.
Sauté mushrooms in olive oil and glaze with Custom Culinary® Gold Label True Foundations™ Vegetable Liquid Stock Concentrate.
Prepare polenta according to package instructions, add Custom Culinary® Gold Label True Foundations™ Vegetable Liquid Stock Concentrate to liquid in polenta method (2 teaspoons to 8 ounces of water).
Serve steak alongside prepared polenta and sautéed mushrooms.