Preheat oven to 350º. Heat canola in a large skillet (use one with a lid) or Dutch oven over medium heat.
Season chicken thighs on both sides with salt and pepper. Add to skillet skin-side down and cook for about 5-8 minutes until well browned. Remove to a plate.
Add onion and garlic to the skillet and cook briefly until fragrant. Add tomatillos and cook for 5-6 minutes until they begin to soften.
Mix in jalapeño, cumin seeds, chicken broth, and ½ tsp salt. Return chicken thighs to skillet skin-side up. Cover and transfer to oven. Braise for 30 mintues.
While chicken is braising, cook the rice: in a medium saucepan combine rice with 2 cups water or broth and bring to a boil over high heat. Cover, reduce heat to low, and simmer for 15 minutes. Remove from heat and leave covered until ready to serve.
Remove chicken thighs to a plate. Transfer tomatillo mixture to a blender or food processor. Add cilantro and blend until smooth.
Serve chicken thighs over rice, covered in tomatillo sauce. Topped with cotija or queso fresco and pepitas.