Measure the milk with oats and place them in a medium-size saucepan.
Add a tiny pinch of salt.
Bring everything to a slow boil, reduce the heat and carry on simmering until the porridge thickens a little. You can add more milk if needed. This step can also be done easily in the microwave (just boil for 2-4 minutes, stiring and checking every minute or so to make sure the porridge doesn't boil over).
Carry on stirring carefully for 5 minutes or until most of the liquid is absorbed into the oats.
Add the vanilla extract if using and stir gently in.
Add the 2-3 tablespoons of Nutella or other hazelnut chocolate spread.
Adjust the amount of tablespoons by tasting your porridge and check that the oats have been softened enough.
Serve straight away, topped with hazelnuts, more Nutella or chocolate pieces (grated or chopped).