Rinse the chicken, then use paper towels to pat dry.
Mix the paprika, onion, garlic, and pepper powders. Use the mixture to season the chicken on both sides. Using your preferred method, cook the chicken until the internal temperature reaches 160º F. You may use an Air fryer for this. Set the temperature of the Air fryer to 360 degrees and cook for 14-15 minutes. Time may vary a bit depending on the thickness of the chicken breasts.
You can use a skillet as an alternative option. Take a large skillet. Add 2 tablespoons of olive oil to that. Then add chicken and cook for 4-5 minutes on each side.
While the chicken cooks, heat olive oil in a large skillet over medium-high heat. Sauté the mushroom in the pan for four to five minutes.
Toss the mushrooms in a pan with the thyme, onion, garlic, and salt powders; stir to coat.
Then add butter and reduce to medium heat. Sprinkle flour on top of the mushrooms when they have melted. Mix for a minute.
Preheat the oven to broil low. To the skillet, add the soy sauce and vegetable stock. Stir and scrape the bottom. Turn up the heat to medium-high and simmer for three minutes to thicken. Taste the gravy and adjust the seasoning with salt and pepper if necessary.
Take the chicken out of the oven. Place a piece of parchment paper (or aluminum foil) on a cookie sheet or baking pan, then arrange the chicken pieces on the sheet. Every chicken breast should have a slice of Monterey jack cheese on it, along with some parmesan cheese. Let the cheese melt under low broil for two to three minutes. (Pay close attention)
Take out and place the chicken on a plate. Place chicken on top of the mushrooms and gravy, then garnish with fresh parsley.
Your delicious Portobello Mushroom Chicken is ready. Bon Appetit!