Caramelized Onion, Arugula, & Herbed Mayo Gourmet Grilled Cheese

Your favorite comfort food just got even better! Fresh sourdough bread, loaded with sweet, caramelized onions, a delicious, herbed mayo, fresh arugula and that decedent melty gruyere cheese and toasted to perfection in a hot skillet! You better make extra!

These are sooooo good!

  • Prep time: 5 minutes
  • Cook time: 15 minutes
  • Serves: Ingredients required per sandwich


  • 3 T. mayonnaise
  • 1 t. fresh parsley, chopped
  • 1/4 t. dried oregano
  • 2 slices sourdough bread
  • 1 T. softened butter
  • 2 T. caramelized onions, store bought or homemade
  • 2 slices gruyere cheese
  • 1/2 c. arugula leaves, roughly chopped (or baby arugula)
  • 2 slices gouda cheese
  • 1 c. cherry tomatoes, to serve


  1. In a small bowl, combine the mayonnaise, parsley, and dried oregano.
  2. Butter the outside of the slices of sourdough bread.
  3. Assemble the sandwich by layering the herbed mayo, caramelized onions, gruyere, arugula, and gouda between the non-buttered sides of the bread.
  4. Place the sandwich buttered side down on a non-stick frying pan and place over medium-low heat. Cook until golden-brown and crispy on both sides, approximately 6-7 minutes per side.
  5. Serve alongside cherry tomatoes or a simple salad.


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