Slow Cooker Onion Soup

Ingredients (12)

• + ¼ cup butter, melted add to pantry
• + 1 large sweet onion (such as Vidalia®), cut into thin slivers add to pantry
• + 1 small red onion, cut into thin slivers add to pantry
• ✓ 2 cloves garlic, minced
• + 4 cups beef stock add to pantry
• + 3 tablespoons brandy add to pantry
• + 2 teaspoons soy sauce add to pantry
• + 2 teaspoons Worcestershire sauce add to pantry
• + salt and ground black pepper to taste add to pantry
• + salt and ground black pepper to taste add to pantry
• + 2 cups Italian-style seasoned croutons add to pantry
• ✓ 3 slices provolone cheese