Add first 6 ingredients to a small pot and warm over medium heat, about 5-10 minutes (depending on how quick your element heats up)
Meanwhile, mix corn starch into water in a cup until corn starch is dissolved
Once sauce is simmering, whisk in corn starch water. Stir sauce until it thickens to your desired consistency. I like a fairly thick sauce so I often cook it for about 5 minutes.