Cut chicken in half or flatten with a mallet. Season both sides with spices.
Mix Worcestershire sauce, lemon juice, garlic, olive oil, and soy sauce together for marinade.
Over the chicken, pour the marinade. Let the marinade sit in the fridge for several hours.
Heat the griddle, and add butter. Cook onions until soft.
Add mushrooms and butter. Season, stir, cover, and cook. Remove from heat.
Melt butter in the pan. Cook marinated chicken until golden and 165°F.
Top chicken with mushrooms, onions, and Jack cheese. When the cheese is melted, cover it with a lid.
Enjoy your delicious chicken smothered in the sauce!