Open-Faced Baked Reubens | Publix Super Markets

Ingredients

• 1 large yellow onion
• 1 flat-cut corned beef brisket (2–3 lb)
• 1/2 teaspoon caraway seeds
• Aluminum foil
• 1 small head green cabbage
• 2 cups vegetable broth
• 1/2 cup Russian dressing
• 2 tablespoons coleslaw seasoning mix
• 6 teaspoons unsalted butter, divided
• 6 slices Bakery rye bread
• 6 oz Swiss (or aged white cheddar) cheese
• 1 (24 oz) container refrigerated mashed potatoes