Pat chicken dry using a paper towel.
In a small bowl, stir together the oil, lemon juice, zest, garlic, oregano, mustard, sea salt, and pepper.
Add your chicken to a baking dish, large enough to fit them all in a single layer without overlapping. Drizzle chicken with your marinade and rub them to coat well on all sides.
Allow the chicken to marinate for at least 30 minutes in the refrigerator (Or, if time allows, cover and refrigerate overnight).
Once ready to bake, remove your chicken from the fridge and preheat your oven to 350 degrees f.
If desired, tuck a few fresh lemon slices around your chicken and sprinkle with fresh herbs, as shown.
Bake your chicken for 45 minutes, or until the inside of each chicken thigh reads 165 degrees f.