Pulse the onion, mushrooms and thyme in a food processor until finely chopped but not a purée.
Tip into a large frying pan, sauté for 7-10 minutes or until most of the liquid evaporates. No need to wash out the processor - put the rice, tofu and miso into the processor and pulse until well incorporated.
Tip the contents into a large bowl, stir in the mushrooms and onion and mix really well until all the ingredients are completely combined.
Pack into muffin trays. This makes enough for 6 small or 4 large roasts.
Bake for 30 minutes.
Cool for 5 mins, tip out onto baking tray and put back in oven for 5-10 minutes.
Recipe by Plant Based Family Down Under at https://plantbasedfamilydownunder.com/2023/01/02/mushroom-rice-tofu-mini-roasts/