Preheat oven to 180°C and cook the burgers in oven for 20 minutes.

Toast your cumin seeds in a pan for 30 seconds, then add the oil and sliced onion, when they start to colour add half the lime juice.

Next add the peppers and cook just to soften, season and set aside.

Carefully wipe the pan clean ready to use again.

Peel the avocado, add remaining lime juice and pinch of salt then mash together.

Spread some refried beans across the middle of the wrap and place in a dry pan for a bout 30 seconds.

Next slice the burger into strips and panfry, until lightly coloured

Add the sliced burger, pepper and onion mix, avocado and coriander leaves to the wrap and roll. Add a squeeze of lime if desired.

Top Tip: Wrap the burgers in foil before placing in the oven and open up for the last five minutes of cooking for and extra juicy burger, just like Mary does at home.