A Simple Burger with a Red Wine Sauce - Sutter Home Family Vineyards

Ingredients

• 2 tablespoons Olive oil
• 2 tomatoes, 1 sliced for topping burger, 1 quartered for stock
• 1 stalk celery, diced
• 1 sweet red pepper, diced
• 1/2 cup chopped portabella mushrooms
• 1 bottle Sutter Home Cabernet Sauvignon (plus another bottle to enjoy while cooking)
• 2 cups rich beef stock
• Course salt
• Fresh Ground pepper
• Vegetable oil for grill
• 2 lb. ground chuck
• 3 fl. oz. sour cream (3/8 cup)
• ½ cup onion, finely minced
• 6 Sourdough buns
• Butter, softened
• Mayonnaise