Mash together the avocado and lime
juice. Stir through the sweetcorn, tomato,
half the coriander and seasoning to make
a salsa. Set aside, covered with cling film.
Heat the oil in a non-stick frying pan
or griddle pan and cook the onions for
about 8 mins until lightly charred and
slightly softened. Remove to a warmed
Dust the steak with the fajita seasoning
and some black pepper, then add to the
pan. Cook for 2-3 mins, depending on
how rare you like it, then add to the
onions. Meanwhile, warm the tortillas
following pack instructions. Serve the
steak and onions with the tortillas, salsa,
lettuce, jalapeño peppers and lime wedges.