Season the chicken thighs generously with salt and pepper on both sides.
Add olive oil to a large dutch oven or braiser with a lid, heat over medium-high heat.
Sear the chicken for about 3-4 minutes per side, until golden brown each side. Remove the chicken from the pan to a plate or bowl, set aside.
Turn the pan to medium heat, add the diced onion, minced garlic, bay leaf, cinnamon, cloves, all spice, salt and pepper, cook for 3-4 minutes to soften the onion, stirring occasionally.
Add the tomato paste, cook down for 3 minutes, stir occasionally.
Add red wine and cook 3-4 minutes to reduce slightly. Then add 3/4 cup water and passata and bring to a simmer over medium-high heat. Once simmering, add the chicken and their juices back, nestling into the sauce. Put the lid on and turn the heat to medium-low to keep at a simmer for 30 minutes. While simmering, preheat the oven to 350F.
After 30 minutes, remove the chicken to a new bowl or plate.
To the pot stir in 2 cups water and 1 cup orzo and bring to a simmer
Once simmering, nestle chicken back in to the pot with the orzo and sauce and bake at 350F for 20 minutes or until the orzo is cooked through. Add a bit more hot water to the orzo if needed when cooking.
Serve with topped with minced fresh oregano, parmesan cheese or feta cheese.