Heat one tablespoon olive oil over medium heat in a 12 inch skillet with a lid. Add onions and mushrooms, cook to soften, about five minute. Add garlic and cook one minute. Remove onion and garlic with a slotted spoon and set aside.

Add remaining two tablespoons olive oil to the skillet, arrange the chicken in a single layer and season with half of the salt, pepper, and herbs, cook about three minutes to lightly brown. Turn and season chicken with remaining salt, pepper, and herbs. Spoon mushrooms and onions over and around the chicken in an even layer. Cook uncovered for ten minutes. Add wine and two slices of lemon, bring to a full boil. Cover and reduce heat to low. Cook ten more minutes.

Transfer chicken to a rimmed serving dish and cut each thigh in half. Discard lemon slices. Stir one tablespoon lemon juice into sauce and raise heat to medium. Cook to reduce sauce, stirring to scrape up brown bits from the bottom of the pan, about two minutes. Spoon sauce over chicken and serve.