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Four-Cheese Grilled Cheese Sandwich

Prep Time: 10 min
Cook Time: 20 min

Ingredients

  • 2 tablespoons salted butter, softened
  • 1 teaspoon minced garlic
  • 2 thick slices Italian bread
  • 1 ½ tablespoons olive oil, divided, or more as needed
  • 2 cups chopped fresh spinach
  • ½ cup giardiniera, drained
  • 2 slices mozzarella cheese
  • 2 slices provolone cheese
  • 2 slices Asiago cheese
  • 2 slices Fontina cheese
  • 3 slices Roma tomato, cut lengthwise, or more to taste