Melt butter in a large skillet set to medium-high heat.
Add minced garlic, chopped oregano, rosemary, and thyme; cook for about a minute until aromas bloom.
Place chicken thighs or breasts in the skillet and cook each side for 7 to 8 minutes until no longer pink and cooked through.
Transfer the cooked chicken to a plate and keep warm.
Add sliced zucchini to the skillet, season with salt and pepper, and sauté for 3 to 5 minutes until tender.
Return the chicken to the skillet with the zucchini and heat together briefly before serving.