Peal and chop onion into small cubes.

Heat oil on frying pan at high temperature.

Throw the onion in and stir until its colour turns clear.

Throw in the mince, save 1 tsp for the soup.

Add 1/2 tsp salt and 1/4 tsp sugar. Lower the temperature to medium high. Stir until meat turns brown.

Add 1 tbsp of fish sauce, stir well and remove from heat.

Boil a pot of water at high temperature. Add salt and dashi stock to taste. Add 1 tbsp of mince into the soup and let boil.

Once water is boiled, throw spinach in. Wait for soup to be boiled again and remove the pot from heat.

Serve with rice.