Slice the 3 blocks in a 600g pack of tofu into 4 to give you 12 reasonably thick slices. Any thinner and it's too difficult to handle. You can marinade in soy sauce and chilli garlic sauce if you wish, but that's best done some time before.
After marinading, you can press the tofu to remove some of the water - use the same dish you used to marinade the tofu. Placing it on kitchen towel can make the batter stick better, but is an optional additional step.
mix the milk, aqua faba and flour(s) into a medium thick batter. It mustn't be too thick, but wants to be thick enough to stick to and coat the tofu.
mix the panko breadcrums and other coating ingredients together and place them in a shallow bowl.
Dip the tofu in the batter, and then in the bread crumbs - pressing it gently into the mixture to get the breadcrumb mixture to adhere to the tofu.
Pan fry or bake in the oven until golden brown. Baking in the oven doesn't give such a good result, but does avoid it breaking up as you turn it over. Turning it over requiresa a bit of skill to stop the crumbs coming off or it breaking.
You can cut the finished panko tofu in half diagonally to make 24 pieces - but it's very tricky unless you have a super sharp knife so generally I don't bother. Pour the sauce into a well in the sticky brown rice, and serve 4 each of the panko tofu triangles on top (or 2 whole slices). Add any additional veggies on the side.