Caramelised Onion, Cherry Tomato and Blue Cheese Tart

This was such a good recipe I just had to share!

Pastry
2 cups pl flour
125g cold butter
1/4 cup finely grated parmesan
1 egg, lightly beaten
chilled water

Filling
2 tbsp olive oil
3 onions, sliced
100g blue cheese
3 eggs, lightly beaten
1/4 cup cream
1/2 cup finely grated parmesan
pinch nutmeg
1/2 punnet cherry tomatoes, halved

1. To make pastry, put flour and butter in food processor and blend until mixture resembles fine bread crumbs. Add parmesan and mix 10 secs. With motor running, add egg and enough water to bring the mixture together (up to 60ml water).
2. Tip dough out on a floured surface and work into a ball. Flatten ball, wrap in cling wrap and refrigerate 30mins.
3. Preheat oven to 200 degrees. Roll out dough between two sheets of baking paper, remove top sheet and place in a fluted loose bottom tart tin. Push pastry gently into the tin.
4. Blind bake (line with baking paper and baking beads) for 10mins. Remove paper and beads and bake for another 5 mins or until pastry is golden.
5. Heat oli in a pan, add onion and cook until caramelised. This can take 20 mins. Allow to cool.
6. PLace cooked onion into cooked tart shell then sprinkle with blue cheese. Whisk together eggs, cream, parmesan and nutmeg and pour over the top. Top with the halved cherry tomatoes. Bake on a baking tray for 20-30mins or until set.