Slice the super firm tofu ⅛" - 3/16" on a mandoline. I sliced mine 3/16" because I wanted thicker slices. As you slice, rotate the block. The corners may get stuck and break off, but if you rotate the block there will be less breakage.
In a medium mixing bowl, add all of the rest of the ingredients Whisk.
Place the tofu and the marinade in a large skillet. Cook on low for 2-25 minutes, or until the liquid cooks down.
Notes
You can use extra firm tofu but you'll need to drain and press it. It isn't quite as firm, but it works.You could use a knife if you don't have a mandoline. Make sure to cut uniform slices, so it cooks at the same time.This recipe will last about 5 days in an airtight container in the fridge.