Ingredients
- 1/2 onion thinly sliced
- 1 tbsp olive oil
- 250 g mushrooms sliced
- 2 tbsp oyster sauce
- salt
- pepper
- 40 g mild cheddar or mozzarella shredded
- 4 slices sourdough bread
- arugula
- 2 tbsp mayonnaise
- 1 tbsp pesto (optional)
Instructions
- Heat oil in a skillet over medium heat. Add onion and cook 2-3 mins, until translucent. Add mushrooms and oyster sauce and stir fry another 5-6 minutes, until the moisture disappears.
- Remove from heat and mix in the cheese. Stir until well-combined and cheese is melted.
- Assemble the sandwiches: sourdough, arugula, mushroom cheese mix, mayonnaise, sourdough. Brush bread with a thin layer of pesto (see notes). Return skillet to medium heat and place the sandwiches pesto side down.
- Cook for 3 minutes, or until the bread is evenly golden and crisp, pressing down lightly with a spatula every now and then. Brush on more pesto and flip the sandwiches. Cook for another 3 minutes.
- Transfer sandwiches to a cutting board, slice in half and enjoy!
Notes
if you don't want to cook the sandwich in pesto, butter or more olive oil works just the same!