Salad with blackberries and feta

1 red onion

3 TBSP red wine or sherry vinegar

1 TBSP sugar

1/2 tsp mustard seeds

1/4 tsp salt

Black pepper

500 g/2 cups blackberries

2 TBSP sugar

1 organic lemon (grated zest)

Green lettuce

100 g/4 ounces feta cheese

Fresh mint leaves, shredded

3 TBSP olive oil

(Salt and) pepper

Peel the red onion and cut it in half. Cut the onion in very thin slices and toss them in a bowl with vinegar, sugar, mustard seeds, salt and freshly ground black pepper. Cover the bowl and let it rest 1 hour.

Clean the berries and toss them in a bowl with sugar and lemon zest. Let it sit on the kitchen table 1 hour.

Wash and spin lettuce and arrange it in a big bowl. Mix red onions and berries with juices and arrange on top of the lettuce. Sprinkle with feta and shredded mint and drizzle with olive oil. Sprinkle with a little salt and freshly ground black pepper.