The Ultimate Grilled Cheese – Cappello's

Ingredients

• For the Grilled Cheese
• 1 Cappello’s Naked Crust
• ½ medium yellow onion, cut into ½- inch slices
• 3 tablespoons unsalted butter, divided
• ¼ teaspoon kosher salt
• 1 tablespoon dijon-style mustard
• 2 ounces muenster, sliced
• 2 ounces sharp cheddar, sliced
• 2 ounces gruyere, sliced
• For the Tomato Soup
• 1 tablespoon unsalted butter
• ⅓ cup yellow onion, diced
• 1 tablespoon (3 cloves) garlic, minced
• ½ teaspoon kosher salt
• ¼ teaspoon ground black pepper
• ⅛ teaspoon red pepper flakes
• 1 14.5-ounce can diced fire-roasted tomatoes
• ¾ cup vegetable broth
• ¼ cup half & half or heavy cream