Heat the oil in a pan on high heat, and immediately add the diced potatoes. Fry off by consistently stirring until they have started to soften. Add the onion and stir until they have started to wilt. Then add the frozen carrots, peas, and corn. Stir for about a minute. See note 1.
1 cup All rounder potato, ¾ cup Onion, 1½ cups Mixed vegetable
Stir through the salt and curry powder until everything is completely coated. Turn off the heat and sprinkle the plain flour on top and then stir that through, ensuring everything is coated and all the flour has completely dissolved. Set aside and allow it to cool to room temperature. See note 2.
2 teaspoons Curry powder, 1 teaspoon Salt, 1 tablespoon Plain flour
On a clean floured bench top (or a silicone baking mat), lay out one thawed puff pastry sheet at a time, cut it into four even squares. Place 1 tablespoon of filling in the center of each square, then fold one edge over to create a triangle. Press and seal one edge, then hold the triangle like a cone and place another spoonful of filling into the center of it, being careful not to touch the edge of the dough. Then seal the rest of the dough. Use a fork to press the edges down to completely seal. Place each uncooked curry puff onto a lined baking sheet tray. Repeat until all done. See note 3.
4 square sheets Puff pastry
Once all is completed, brush with oil and sprinkle sesame seeds (optional). Bake in a preheated oven of 180°C (360°F) for 16-18 minutes or until golden. Allow them to cool down for 5 minutes then transfer to a wire rack. Best enjoyed whilst warm and flaky.