Slice the chicken breast in half or flatten it using a mallet. Season the chicken breasts on both sides with salt, pepper, onion powder and smoked paprika.
In a mixing bowl, combine the low sodium soy sauce, lemon juice, Worcestershire sauce, olive oil, and minced garlic to make the marinade.
Pour the marinade over the chicken and let it marinate in the refrigerator for a couple of hours or until ready to cook.
Heat a griddle or skillet over medium heat and add a tablespoon of butter. Cook the sliced onions in butter.
Once the onions have cooked and become translucent, add the sliced mushrooms and another tablespoon of butter.
Season them with salt, pepper, and garlic powder as per your taste. Stir the mixture together and cover, reducing the heat. Once cooked, take it off the heat.
In the same pan, melt the remaining two tablespoons of butter.
Cook the marinated chicken on the griddle until it turns golden brown and reaches an internal temperature of 165 degrees Fahrenheit.
Top the cooked chicken with the sautéed mushrooms, onions, and a slice of Jack cheese.
Cover the smothered chicken with a lid until the cheese melts.
Serve and enjoy your delicious smothered chicken!