Bring 3 tbsp olive oil to a small pot and heat pot using medium heat. Add diced onion and minced garlic. Saute until fragrant, but do not brown or burn garlic and onions.
Turn off heat then add the rest of the ingredients under "Sauce" to pot. Bring to a boil and stir. Once it boils, turn off heat immediately. (Important: do not over boil.)
Pre-heat oven to 350 degrees F.
In a 9" x 13" casserole dish, add basmati rice, then add sauce/liquid from the pot to casserole dish. Using a spatula, spread rice out evenly so that it bakes evenly.
Place six chicken thighs on top of rice and sauce/liquid. Spread chicken thigh pieces out with some space between them.
Using a brush, brush olive oil onto the top of each chicken thigh. Then evenly distribute salt, pepper, oregano and thyme among the six chicken thighs.
Wrap casserole dish with aluminium foil, then bake for 30 minutes.
Remove aluminium foil and bake for another 15 minutes. Using the meat thermometer, check to make sure chicken is cooked (thickest part should be at least 165 degrees F). If chicken is not cooked, bring casserole back to the oven and bake for longer. Bake for longer if needed if rice is not properly cooked.
Remove from oven and let it stand for 10 minutes before serving.
Serve and enjoy!