Oktoberfest Ribs with Apple Sauerkraut

Ingredients

• 4 pounds pork spareribs trimmed to fit into slow cooker, cut in 2-rib portions
• 1 teaspoon vegetable oil
• 2 small red potatoes sliced 1/4-inch thick
• 1 small red onion peeled and sliced
• 1 1-lb package refrigerated sauerkraut rinsed and drained
• 2 small red apples cored and sliced 1/4--inch think
• 1/2 cup apple cider
• 4 tablespoons ketchup
• 1/2 teaspoon caraway seed coarsely crushed