Marinated portobello mushrooms are sliced and marinated in a mixture of oil, vinegar, and seasonings then cooked until lightly caramelized and irresistible.
Make the marinade. In the bottom of a medium bowl, combine olive oil, red wine vinegar, dried oregano, dijon mustard, kosher salt, freshly ground black pepper, and a pinch of sugar. Whisk until smooth.
Marinate. Toss the mushrooms with the marinade until each piece is no longer dry. Cover and store in the fridge for 30 minutes.
Caramelize. Heat a large skillet or grill pan over medium heat. Once hot, add the marinated mushrooms as well as the excess marinade from the bottom of the bowl in a single layer. Cook for 8 minutes, flip, and cook for 7 minutes until both sides are browned and caramelized.
Serve. Remove from the heat. Spoon some of the leftover marinade from the pan over the mushrooms and sprinkle with flaky salt. Enjoy warm or cold.
Notes
Use at least 6 oz of portobello mushrooms. You can use more, just adjust the marinade ingredients as needed.See the blog post for helpful tips, storage, serving ideas, and recipe FAQs.
Make It Your Way: Substitutions & Variations
No red wine vinegar? - you can also use a combination of balsamic vinegar and fresh lemon juice, or sherry vinegar.No dried oregano? - any other dried herbs or Italian spices are fine.Add-ins - Worcestershire sauce, coconut aminos, soy sauce or tamari, maple syrup, minced shallots, minced or dried garlic, or smoked paprika for a smoky flavor.