First up, make your dough. Combine 200g plain flour and 100ml water in a large bowl and mix using chopsticks or your hands until a shaggy dough forms
Next up, knead your dough until a shaggy dough ball forms, then keep kneading for 30 seconds. Wrap the dough ball in cling film (plastic wrap) and set it aside while you make the filling.
In a large bowl, combine the ground beef, minced garlic, chopped ginger, finely chopped lemongrass, fresh coriander (cilantro), fresh mint, grated carrot, chilli flakes, sugar, salt, fish sauce, and rice wine vinegar. Give it a good mix until a rough paste forms.
Once you've made your filling and set it aside, get your dough and knead it for another 30 seconds on a clean, lightly floured surface until a firm and smooth dough forms.
Poke a hole through the centre of the dough and then stretch the dough to form a doughnut. Cut the doughnut and form it into a log around 20cm long. Then, slice into 15-20 equal pieces.
On a floured surface, roll each piece of dough into a thin circular wrapper, around 10cm in diameter. Set aside and repeat for all the pieces of dough.
Once your wrappers are done, place a heaped tablespoon of the filling into the centre of the wrapper and in a clockwise motion, pinch the edge of the dough until it comes together. Alternatively, you can just bring all corners of the circle up together and pinch. Repeat for all the dumplings until the wrappers and filling have run out.
Get yourself a large non-stick frying pan (that has a lid). Drizzle in a bit of oil and place on medium heat. Add in all your dumplings and then pour in 75ml water. Place on your lid and cook for 8 minutes (don't overcook!). Remove the lid and cook until the bottoms of the dumplings are crispy (another 2 minutes).
Meanwhile, make your spicy fish sauce by combining your fish sauce, rice wine vinegar, chillies, and boiling water. Get your cooked dumplings and divide them between your bowls. Top with the fish sauce so they're drowned in them, spring onions, and sesame seeds. Enjoy hot!