1 large or 2 small red onions , thinly sliced
1/2 tsp fresh thyme leaves
1 tbsp balsamic vinegar
1 tsp soft brown sugar
2 flour tortillas
55g Cheddar cheese, grated
Salt and pepper
Heat the oil in a small frying pan. Add the onion and thyme and cook over a medium heat for 15 minutes until the onion is soft.
Increase the heat to high and add the vinegar and sugar. Cook, stirring until the vinegar has evaporated. Remove from the heat and season to taste. Cool slightly.
Heat a large non stick frying pan or griddle pan. Spread the onions over one of the wraps and scatter the cheese over.
Sandwich with the second wrap, then griddle for 2 to 3 minutes either side until the cheese has melted or cook in the frying pan. Transfer to a board and cut into wedges.