Half a red onion

Onion pickle Finely slice the onion, then tip into a bowl with a pinch of salt. Mix with 1 tbsp vinegar and leave for at least 10 mins to pickle. Try stuffing into a cheese toastie.

Pico de gallo

Finely slice the onion and mix with chopped tomatoes, chillies, coriander and lime juice.

Quick onion relish

Slice the onion and fry in oil for 10 mins until caramelised. Add 1 tsp each honey, mustard, ketchup and vinegar. Cook until sticky, then serve on hot dogs.

Cheese & onion topping Chop the onion and fry in butter for 5-6 mins. Cool. Mix with 50g grated cheddar and fold into an omelette or spread on bread for cheese on toast.