Caramelised butternut squash and quinoa burritos

oil

butternut squash flesh (around half a medium squash, grated)

onion (halved then sliced)

garlic (minced)

sugar (optional)

quinoa

Salt

Black pepper

large flour tortillas (I used herbed ones, but any will do)

fresh spinach (roughly chopped)

fresh coriander (roughly chopped)