You can soak all the Plant Mate products in a liquid that changes the colour of the Plant Mate pieces. You can also add taste to the products through the liquid by for instance using spices.
For 125g Plant Mate you need ½ litre liquid and a little salt. 125g Plant Mate grows to about 400g after having absorbed the liquid. It takes roughly 10 minutes. Stir in the bowl occasionally.
Here are some proposals for the colour palette: