Ingredients
- 1 large yellow onion, thinly sliced
- 1 tablespoon olive oil
- 1 tablespoon unsalted butter (plus more for spreading on bread)
- 1 large apple (Granny Smith or Honeycrisp), thinly sliced
- 4 slices of sourdough or country bread
- 4 slices sharp cheddar cheese
- 1 teaspoon balsamic vinegar (optional)
- Salt and pepper to taste
Instructions
- Caramelize the Onions:
Heat olive oil and 1 tablespoon of butter in a skillet over medium heat. Add the sliced onions, season with a pinch of salt, and cook, stirring occasionally, for about 20 minutes until the onions are golden brown and caramelized. Add balsamic vinegar (if using) and cook for another 1-2 minutes. Set aside.
- Prepare the Sandwiches:
Butter one side of each bread slice. On the unbuttered side, layer 1 slice of cheddar, a portion of the caramelized onions, a few apple slices, and another slice of cheddar. Top with the remaining bread, buttered side facing out.
- Grill the Sandwiches:
Heat a skillet over medium heat. Place the sandwiches in the skillet and cook for 3-4 minutes on each side, pressing gently with a spatula, until the bread is golden brown and the cheese is melted.
- Serve:
Slice in half and enjoy warm!
- Prep Time: 10 minutes
- Cook Time: 25 minutes
