Place chicken in the bottom of the slow cooker.
Season chicken with the spices.
Add all of the ingredients on top except for the water and corn starch (the order doesn't really matter)
Cook on high for 4 hours (or medium for 6, low for 8)
In a small sauce pan, whisk the cold water with the cornstarch until well blended.
Add about 1/2 cup of the liquid from the slow cooker to the sauce pan and whisk.
Heat over medium heat until it bubbles and thickens.
Mix the thickened liquid back into the slow cooker and stir. Let it cook for another 10 minutes.
Serve chicken over rice. Top with some of the sauce and then some sesame seeds.