Season the chicken with soy sauce, Worcestershire, salt, pepper, paprika, cumin, oregano, garlic powder, olive oil and pickle juice. Let it sit while the pan heats.
Melt the butter in a shallow pan over medium-high heat. Sear the chicken on both sides until golden. Take the chicken out and set it aside.
In the same pan, add the onion, tomatoes and garlic. Cook until they soften, scraping up the browned bits. Stir in the tomato paste and oregano and cook until rich and concentrated.
Pour about 1½ cups chicken stock into the pan and stir to lift the flavor from the bottom.
Nestle the chicken back in and add the bay leaves. Add more stock as needed so the liquid comes almost to the top of the chicken.
Turn the heat down and simmer until the chicken is tender and the sauce has thickened.
Taste the sauce and add extra salt only if needed. Finish with parsley.