Panini with Balsamic Onions and Mushrooms with Provolone


Melt in your mouth delicious! My hubby and I devoured these after a busy morning at soccer with the kids. I didn’t have any meat in the house, but the hubby said sliced steak would be the perfect addition to this, so give it a try meaty or meatless!


  • 1  large cooking onion or sweet onion, thinly sliced
  • 227g (8 oz) package of sliced cremini mushrooms
  • 2 tablespoons of extra virgin olive oil, plus more to oil the panini press/grill pan/frying pan
  • 2 tablespoons of balsamic vinegar
  • Kosher (coarse) salt and pepper to season
  • Sliced provolone cheese – 8 slices
  • 8 slices of sourdough bread



  1. Heat a large skillet to medium with 2 tablespoons of extra virgin olive oil
  2. Add onions, season with a sprinkle of salt and a few grinds of pepper, and cook for 3-5 minutes until slightly transluscent
  3. Add mushrooms to onions and stir to combine
  4. Add the balsamic to the mushrooms and onions and stir to combine.
  5. Turn heat down to medium low, season again with a sprinkle of salt and pepper and place a lid on the skillet and let the onions, mushrooms and balsamic cook slowly and reduce. Stir occasionally over 10-20 minutes, keeping an eye on the process and how the onions and mushrooms are doing. Once the onions and mushrooms have softened and absorbed the liquid, taste for a quick check, and then once you have determined they are done remove from the heat.
  6. Pre-heat your panini maker if you have one, or a grill pan, or a frying pan (make it grill-cheese style).
  7. Place the bottom slices of bread down and place one slice of provolone on the bottom. Add a heaping portion of mushrooms on top of the cheese, and then top with another slice of provolone. Place a  slice of bread on top.
  8. Brush your panini maker (or grill pan or frying pan) with extra virgin olive oil. Place sandwiches in the panini press (or on a grill pan or frying pan) and grill until cheese has melted and the sandwich is nicely grilled (a few minutes). Remove and let cool a minute or two before slicing as the cheese will ooze!

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