Grilled Samuel Adams Boston Lager Marinated Hanger Steak

Ingredients

• 6 portions of cleaned hanger steak, 6 ounces each
• pinch of red pepper flakes
• 1/2 cup samuel adams boston lager
• 2 tablespoon red wine vinegar
• 1/4 cup olive oil
• 1 sprig rosemary, leaves only
• 1/2 tablespoon pepper
• 1 tablespoon salt
• 6 cloves crushed garlic