Preheat the oven to 350°F.
In an oven-safe pan with high sides (I use a wide dutch oven pan), add 2 tablespoons avocado oil. Heat on a medium flame until slightly sizzly.
Pat the 6 chicken thighs dry with paper towel and sprinkle both sides of the with 1 teaspoons fine sea salt total.
Place half of the chicken thighs, skin side down, into the hot oil. Cook for about 5 minutes or until the skin easily pulls away from the pan and is a golden yellow color. Turn the chicken over and cook for 1 minute. Transfer to a plate.
Repeat the chicken cooking process in Step 3 with the remaining 3 chicken thighs. Place chicken thighs onto the plate with the other pieces from before.
The pot should still be hot with leftover oil. To the pot, add the sliced 1 medium onion and 4 garlic cloves. Cook 3 minutes until onions are beginning to become translucent.
Next, add 1.01 tablespoons avocado oil, 2 pints colorful cherry tomatoes (half sliced & half whole), ½ cup pimiento manzanilla olives and ½ cup pitted black olives and mix to combine. Cook for 4-5 minutes until the tomato juices appear. Sprinkle with 1 teaspoons fine sea salt, chopped 1 tablespoon fresh thyme and 1 teaspoon granulated sugar. Cook for another 2 minutes.
Carefully place chicken thighs back into the pan and spoon the hot tomato-olive liquid over each chicken thigh so they’re coated in flavor.
Sprinkle 0.5 teaspoons fine sea salt over the entire pan of chicken along with ¼ teaspoon ground black pepper.
Cover the pan with an oven-safe lid (or aluminum foil) and bake for 35 minutes.
Uncover at the 30 minute mark, baste with the tomato liquid and cook at 425°F for 15 minutes.
Allow chicken to cool 5-10 minutes before serving. Garnish with 2 tablespoons fresh parsley .