Balsamic-Glazed Steak Tips and Mushrooms | Foodtalk

Ingredients

• 1 1/2 pounds top sirloin steak, cut into 2 inch pieces
• 1/4 cup soy sauce
• 2 tablespoons balsamic vinegar
• 2 tablespoons minced garlic
• 1 tablespoon grated fresh ginger
• 1 teaspoon kosher salt, divided
• 1/4 teaspoon ground black pepper
• 2 tablespoons olive oil
• 4 tablespoons butter, divided
• 1 medium red onion, cut into wedges
• 1 pound fresh shiitake mushrooms, stemmed and quarted
• 1 tablespoon chopped fresh cilantro