Bubble and Squeak | America's Test Kitchen

Ingredients

• 1 1/2 pounds russet potatoes , peeled and sliced 1/4 inch thick
• Salt and pepper
• 8 tablespoons unsalted butter , cut into 8 pieces
• 1 small onion , chopped
• 1/2 small head savoy cabbage , cored and cut into 1-inch pieces (5 cups)