Roughly chop the mushrooms and add to a large frying pan with the olive oil.
Fry on a medium to high heat for 5 minutes stirring regularly.
Finely chop the garlic and add to the mushrooms along with the thyme and paprika.
Turn down the heat and cook for a further 5 minutes.
Add the brown rice and black beans and season generously with salt and pepper.
Cook for a final 5 minutes then set aside.
Shred the cos lettuce, finely chop the spring onion and roughly chop the tomato and avocado.
To assemble the burritos, firstly warm the tortillas in a dry frying pan.
Place a large portion on the mushroom, rice and beans on the centre of the tortilla.
Top with the lettuce, spring onion and tomato and avocado.
Add some of the jalapeños, grated cheese, plant-based yoghurt and a squeeze of lime juice.
Fold the side of the tortilla over the filling then carefully roll up from the bottom.