a clean saucepan. Faites gently reduce to medium gentle heat.
Aim to get a more concentrated, slightly nappy base, without being too thick. Count generally 15 to 25 minutes depending on the starting amount.
To check :
trempese a spoon, pass the finger over the back of the spoon: the trace must remain clean and bright;
the liquid should “stick” lightly (not become a fixed frost immediately upon heating).
Let then cool this reduced juice. You can leave it at room temperature until warm, but avoid leaving it in the heat
