In a large bowl, dust the chicken legs with cornstarch and season with salt and pepper. Heat a medium skillet over medium-high heat with some EVOO and brown the chicken legs.
In a slow cooker, add browned chicken legs with teriyaki, ginger, garlic, honey and white parts of the scallions. Put the lid on and cook on low for 5 hours or high for 3 hours.
When the chicken is about 20 minutes away from being done, add rice, water, 2 tablespoons EVOO and salt to a medium pot with a lid. Bring the pot of rice up to a boil then drop it down to a simmer. Put the lid on and simmer 10-15 minutes. When the rice is done, fluff with a fork and fold in the green parts of the scallions and sesame seeds.