A delightful twist on the classic grilled cheese sandwich, featuring caramelized onions and a blend of cheeses for a rich and satisfying flavor.
Peel and slice the red onion into thin rings.
Slice the onion evenly to ensure uniform caramelization.
Heat a non-stick pan over medium heat and add a small amount of butter.
Use unsalted butter to control the saltiness of the dish.
Add the onion slices to the pan and cook, stirring occasionally, until they are caramelized and golden brown.
Cook the onions slowly to bring out their natural sweetness.
Butter one side of each bread slice.
Spread the butter evenly to ensure a golden crust.
Place a slice of bread, buttered side down, in the pan. Layer with caramelized onions and cheddar cheese.
Use a generous amount of cheese for a gooey texture.
Top with another slice of bread, buttered side up, and cook until the bottom is golden brown.
Press gently with a spatula to help the cheese melt.
Flip the sandwich and cook the other side until golden brown and the cheese is melted.
Flip carefully to avoid spilling the filling.
Remove from the pan, slice in half, and serve immediately.
Serve with a side of tomato soup for a classic pairing.