Preheat the oven to 200C fan/gas mark 7. Line a baking tray with greaseproof paper.
Roll out the pastry to a rectangle measuring approximately 25x30cm, then transfer the pastry to the lined baking tray.
Prick the pastry all over with a fork.
Heat the oil in a frying pan, then add the onion, vinegar, sugar and a sprinkling of salt and pepper.
Cook over a medium heat, stirring frequently, for 10 minutes, until the onions have softened and browned slightly.
Spread the caramelised onion evenly over the pastry.
Scatter the diced goat’s cheese over the onion, then bake the tart in the oven for about 30 minutes, until the edges of the pastry are golden brown.
Remove from the oven and serve warm, or leave to cool.
Serves: 6 Slices
Makes: 6 slices
450g puff pastry
2 tbsp olive oil
1 large red onion, thinly sliced
3 tbsp balsamic vinegar
1 tsp soft brown sugar
150g goat’s cheese, diced
salt and black pepper