Sift the plain flour into a mixing bowl. Add the cooking oil and mix until it resembles breadcrumbs. Gradually pour in water while stirring until you achieve a smooth dough. Cover with a damp cloth and let it rest for 10 minutes.

In a separate bowl, combine the chopped peanuts, sugar, and toasted sesame seeds. Mix them together thoroughly to ensure the flavors meld perfectly.

Pinch off about 5 grams of the rested dough. Roll it into a ball, then flatten it out to form a small bowl. Place a spoonful of the peanut filling in the center, fold the dough in half, and pinch to seal shut, creating pleats around the edges for a decorative finish.

Heat oil in a deep pot over medium heat. Carefully fry the puffs in batches until they turn golden brown and crispy, making sure not to overcrowd the pot. Drain the cooked puffs on a wire rack to keep them crispy.

Optional: Serve warm with a sprinkle of toasted sesame seeds on top for an extra crunch.