Combine all ingredients (except chicken thighs and lemon) into a mixing bowl.
Using a small zester/grater, add the zest of 1 lemon into the mixing bowl. Cut the lemon in half, thinly slice half of the lemon (the other half will be used to squeeze onto chicken) and aside for later.
Add chicken thighs into the bowl and thoroughly mix well. Cover and marinate for 30 minutes. (note 2)
Preheat oven to 180°C/350°F.
Spread marinated chicken thighs onto a lined baking tray, leaving wiggle room in between each piece. Squeeze a few drops of lemon juice onto each chicken thigh. Scatter thinly sliced lemons onto the tray. Place in the middle rack of the oven and bake for 10 minutes.
Take the chicken out of the oven, turn the oven temperature up to 200°C/400°F.
Flip chicken over with a pair of tongs and squeeze a little more lemon juice on top. Return in the oven but on the top shelf for 10 more minutes or until juices runs clear when the thickest part of a thigh is cut through.
Baste chicken with chicken juices just before serving.