Pre-heat the oven to 200C/400F/Gas Mark 6. Lightly grease 2 x 12 shallow bun trays. Mix the onions with the sugar, olive oil, chillies, and thyme leaves, spread on a roasting pan lined with parchment and bake for 15-20 minutes until soft but hold the shape. Short crust Pastry: In a large bowl pour in the sieved Odlums flour and grated butter, using your fingertips rub the butter into the flour to get a crumb texture, sprinkle on 3 tbsps water and using a fork stir to bind, you may need a…