The Contemporary Wisconsin Butter Burger - Sutter Home Family Vineyards

Ingredients

• 2 large Granny Smith apples, peeled, cored, and roughly diced
• 1/2 cup golden raisins
• 1/3 cup chopped onion
• 1/4 cup apple cider vinegar
• 1/4 cup sugar
• 2 tablespoons lemon juice
• 1/8 teaspoon cinnamon
• Water, to cover
• 2 pounds ground Angus beef
• 1/4 cup finely chopped celery
• 1/2 teaspoon smoked paprika
• 1 3/4 teaspoons kosher salt
• 1/2 teaspoon freshly ground black pepper
• 6 ounces Wisconsin blue cheese, crumbled
• 6 Kaiser rolls, split
• 2 sticks good-quality sweet cream butter, room temperature
• 3 cups spring mix greens