Sacajawea Burger - Sutter Home Family Vineyards

Ingredients

• 2 tablespoons olive oil
• 1 large Walla Walla or other sweet onion, thinly sliced
• 2 Granny Smith, Pippen or other tart green apples, thinly sliced
• 2 tablespoons golden brown sugar
• ¼ cup rice vinegar
• 2 tablespoons dried cranberries
• 2 pounds ground sirloin
• 2 tablespoons stone-ground mustard
• 2 tablespoons capers
• 1 teaspoon allspice
• 1/3 cup crumbled Oregon blue cheese
• 1 teaspoon salt
• Freshly ground pepper
• Olive oil, for brushing on the grill rack
• 6 large poppy-seed Kaiser rolls, split
• 12 washed fresh arugula leaves