1tablespoon(5g)chopped rosemary, or 1 teaspoon dried
12ounces(342g)cremini mushrooms or brown, ½" thick slices, about 4 cups sliced
2teaspoons(10ml)red wine vinegar
2teaspoons(10ml)soy sauce
1 ½cup(120ml)unsalted chicken stock
½cup(120ml)heavy whipping cream
½cup(50g)shredded gruyere, swiss, or parmesan cheese
Instructions
Prepare the Chicken - Place one of the chicken pieces between two plastic sheets or in a large plastic bag. Flatten with a meat tenderizer to about ½-inch thick. Repeat with the remaining piecesAlternatively, if using two very thick pieces, bigger than 1 inch thick and heavier than 8 ounces, cut in half horizontally to create four total cutlets. Flatten to ½-inch thickness if needed.
Dredge the Chicken - Lightly season each side of chicken with salt and pepper. In a medium bowl, combine flour, 1 teaspoon salt, and 1/2 teaspoon pepper. Dredge the pieces in the seasoned flour, shaking off any excess. Transfer to a plate and set aside.
Pan-Fry the Chicken - Heat a large skillet over medium-high heat. Add the olive oil. Once hot, add the chicken to the pan, presentation side down. Cook until golden brown, about 4 to 6 minutes.Reduce the heat to medium. Flip and cook until the internal temperature reaches 160 to 165ºF (71 to 74ºC) on a meat thermometer, about 4 to 6 minutes. Fry in batches if needed. Transfer to a clean plate and loosely tent with foil to keep warm.
Cook the Alliums - In the same pan used to cook the chicken, melt butter over medium heat. Add the onions and sauté until lightly golden brown and translucent, about 4 to 5 minutes. Add the shallots, garlic, thyme, and rosemary, and saute until fragrant, about 1 minute. Constantly stir to ensure the garlic does not brown.
Cook the Mushrooms - Add the mushrooms, 1/2 teaspoon salt, and 1/4 teaspoon pepper. Sauté until tender, about 3 to 4 minutes. Add the vinegar and soy sauce, cook until the vinegar smell is not as strong, about 1 minute.
Reduce the Sauce - Turn the heat up to medium-high and add the chicken stock. Cook until the sauce reduces by half (about 3/4 cup), about 5 to 7 minutes.Reduce the heat to medium, stir in the cream, and simmer until the sauce thickens, about 3 to 5 minutes—season to taste with salt and pepper.
To Serve - Add the chicken back to the pan, turn to coat and gently simmer until warmed through, about 1 to 2 minutes. Garnish with cheese and top with mushroom sauce and black pepper.
Notes
Vinegar Substitutes: Use white wine vinegar, apple cider vinegar, or balsamic vinegar.
Make it Gluten-Free: Substitute soy sauce for tamari or coconut aminos. Use gluten-free flour or cassava flour to dredge the chicken, or skip that step.
Storing: Cool completely, then transfer to an airtight container and refrigerate for up to 5 days.