Heat the oil in a large pan and fry the onion and garlic for 2 minutes.
Add the mushrooms and fry for another 5 minutes.
Add the beans, capsicum and spice mix and stir through.
Add the can of tomatoes, stir and simmer for 10-15 minutes.
Spread corn chips on a plate and spoon the beans over top.
Serve with guacamole, salsa and/or dairy-free cheese.