1 cup red wine
3/4 cup olive oil
1 Tbsp. lemon juice
1 tsp. salt
1 tsp. pepper
5 cloves of garlic, minced
1/4 onion, diced
1 Tbsp. rosemary

  • Combine all ingredients with steaks, turning to coat well
  • Refrigerate for at least 4 hours, turning several times

Source: https://www.thespruceeats.com/easy-red-wine-marinade-3511042