Once your dough has rested, uncover it and gently knead 2-3 times (only).Before dividing, pinch off a small piece to save for testing oil temperature later.
Then portion out the rest. Though you can eyeball it, weighing each piece helps with uniformity. I recommend 55–60 grams per piece, this is enough for a well-sized samosa without making the crust too thick. You should have about 8–10 portions. Each portion makes 2 samosa so this recipe will yield 16-20 samosas. Always keep the dough covered with a damp cloth so it doesn’t dry out while you work.
Roll each ball into a smooth round and then gently flatten it. Cover with a damp cloth and rest the shaped dough balls again for 10-15 minutes.
In the meantime, in a bowl, make the flour slurry by mixing together 2 tablespoon flour with 3-5 tablespoon water.
Place one dough ball on your rolling surface and flatten it slightly. Since this is a rich, high-fat dough, you usually won’t need any extra flour for rolling. If the dough feels sticky, lightly brush it with a bit of ghee or oil to help it spread smoothly.Don't use dry flour.
Using a rolling pin, roll the dough into a circle about 6 inches wide. The circle shouldn’t be too thick or too thin. What matters most is keeping the thickness even all over.
I find it easiest to roll out all the dough portions first before starting the stuffing and shaping. As you work, always keep the rolled circles covered with a damp cloth so they don’t dry out.
With a sharp knife, cut each circle in half to form two semicircles. Each semicircle will make one samosa. Since all-purpose flour dough can shrink a little as it rests, you may need to roll the semicircles gently again before filling.
Take one semicircle and apread flour slurry along the right side of its straight edge. Keep the other semicircle covered until you’re ready to use it.
Now, bring the left half of the straight edge up so it meets the curved edge, forming the first fold. Then fold the right half over it, slightly overlapping the left fold.
Press gently to seal. You should now have a cone shape. Pinch the pointed tip of the cone tightly; this seal is important so the filling doesn’t leak out during frying.