Pesto, Sundried Tomato & Goat Cheese Burger - Sutter Home Family Vineyards

Ingredients

• ½ stick butter
• 1 Large sweet onion, diced
• 1 cup chopped portabella mushrooms
• ½ cup chopped shitake mushrooms
• ½ tspn kosher salt
• ½ tspn fresh ground pepper
• ½ cup finely chopped and seeded ripe Roma tomatoes
• 1 cup mayonnaise
• 2 TBLSPNS fresh garlic, very finely chopped
• 2 TBLSPNS fresh basil, chopped
• 2 ½ lbs ground chuck
• 6 oz. cream cheese
• 6 oz. goat cheese
• ½ cup sundried tomato in oil finely minced
• ½ cup commercially prepared basil pesto
• 2 tspns kosher salt
• 2 tspns fresh ground pepper
• oil for the grill
• 2 Loaves Italian Semolina Bread sliced in half (sandwich style) and cut into thirds