Grilled Cheese with Bacon, Manchego, Apples, & Red Onion Mayo


For the Red Onion Mayo:

  • 1 tablespoon olive oil
  • 1 medium red onion, thinly sliced
  • 2 teaspoons sugar
  • 2 tablespoons balsamic vinegar
  • ½ cup of mayonnaise
  • 1-2 tablespoons fresh parsley, chopped

For the Sandwiches:

  • 4 slices of bacon, crisped
  • 3 oz grated Manchego cheese
  • 3 oz grated Fontina cheese
  • 1 small apple, thinly sliced
  • Bread of your choice



For the Red Onion Mayo:

  1. Heat a skillet over medium heat and add the olive oil.
  2. Add the sliced onion and season with salt and pepper. Stir in the sugar and balsamic vinegar.
  3. Cook over low heat for 15-20 minutes, until softened and caramelized.
  4. Remove the pan from the heat and allow the onions to cool completely. Once cool, transfer them to a food processor.
  5. Add the mayonnaise and parsley and pulse the mixture until smooth. Season, to taste, with salt and pepper.


For the Sandwiches

  1. Wipe out the skillet used for the onions and add a drizzle of olive oil and a pat of butter. Allow the butter to melt.
  2. Spread two slices of bread with the red onion mayo and then top one slice with the bacon, cheeses, and sliced apple. Top with the other slice of bread. Continue with remaining ingredients until all sandwiches are assembled.


  1. Add the sandwiches to the skillet and cook for 2-4 minutes per side, or until the cheese is melted and gooey and the bread is crisp and golden brown. Serve immediately.


This recipe was adapted from Yes to Yolks.

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