Make the curry ahead of time, and leave it in the fridge overnight.
Put all the ingredients (except butter) into a bowl and mix. When the mixture starts to form crumbs, tip it out onto the counter and knead until the crumb-like texture disappears. Add the butter a little at time while kneading.
Keep kneading until the butter’s well incorporated, and the surface of the dough becomes smooth.
Roll the dough into a ball and place into a bowl, before covering with plastic wrap. Leave the dough to rest until it doubles in size. I left it for one hour at about 28°C.
Punch the air out of the dough and divide it into 8 pieces. Let it sit loosely covered for a further 20 minutes.
If the dough is sticky, sprinkle with a tiny amount of flour.
Using a rolling pin, roll each dough into an oval shape around 12 cm long. Place a tablespoon of curry onto one half of the oval.
Fold the dough in half, lightly pinching the edges together.
Place the pocket of curry in your hand, seam facing upwards. Then seal the bread tightly using your fingers. Repeat, making sure you place the dough seam side down when you put it back on your workspace.
Pour panko bread crumbs into a bowl. Then lightly spray the dough pocket with water, making sure the entire surface is covered.
Place the dough in the panko crumbs and roll it around. Afterwards, don’t forget to place the dough seam side down again.
Leave in a warm place for 20-30 minutes, until the dough expands a little.
Set up the deep frier, making sure the oil’s 160 to 170°C.
Fry for a few minutes, making sure to flip the dough and that the colour’s even. Remove from the oil, and repeat.