Lightly drizzle olive oil in a glass baking dish or enamel pan.
Add chicken thighs and set aside. In a large measuring cup or bowl mix together olive oil, lemon juice, onion, garlic, thyme and oregano until well combined.
Pour onion mixture over chicken thighs and toss to coat.
Nestle lemon slices around the chicken and season with salt & freshly cracked pepper.
Place chicken into the oven and bake for 30-40 minutes (depending on the thickness of the chicken), until chicken is thoroughly cooked and the juice is bubbling.
Cover the pan and let chicken sit for 5 minutes and sprinkle with fresh parsley.
Serve on top of rice, making sure to spoon the juices on top.