Place one slice of bread mayo-side down on the skillet.
Layer with cheese, tomato (if using), and a pinch of pepper.
Top with the second slice of bread, mayo-side up.
Grill until golden brown, about 3–4 minutes per side, pressing gently with a spatula.
Remove from heat and let it cool slightly before slicing.
Serving and Storage Tips:
Serve immediately while the cheese is gooey and warm.
Store leftovers in the fridge for up to 1 day, then reheat in a skillet or toaster oven to maintain crispness.
Variations:
Try smoked gouda, mozzarella, or a cheese blend.
Add caramelized onions or bacon for extra flavor.
Use a dash of hot sauce or Dijon mustard inside for a spicy twist.
FAQ:
Q: Why use mayonnaise instead of butter?
A: Mayo gives a crispier, golden-brown finish and adds a slight tang that enhances the flavor.
Q: Can I make it vegan?
A: Yes! Use plant-based butter, vegan cheese, and vegan mayo.
Q: What kind of bread works best?
A: Sourdough, multigrain, or any hearty artisan bread holds up well to grilling.
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