Add a tablespoon of olive oil to a large saute pan over medium-high heat. While the pan is heating, pat the chicken thighs dry, and sprinkle them with sea salt.
Once the pan is hot, add the thighs to it, searing for 3-5 minutes per side, until golden brown, and cooked through.
Remove the chicken from the pan and chop it into 1-inch pieces.
In the same pan that you cooked the chicken in, melt the butter over medium heat. Add the garlic and ginger and saute for 3-4 minutes, until fragrant but not browned.
In the same pan, whisk together the tomatoes, yogurt, cream, lemon juice, and spices until combined. Bring to a simmer over medium-low heat and cook, stirring occasionally, for 15-20 minutes, until fragrant and slightly reduced in volume.
While the above mixture is simmering, cook your rice according to package instructions.
Return the chicken to the sauce and simmer for 5 minutes more, then remove from the heat.
Serve the chicken over the rice garnished with the chopped cilantro.