Orange to wash, to remove finely (without the white part), peel, cut in half and squeeze the juice. Zest cut into thin strips, squeeze the juice of half a lemon, prepare the remaining ingredients. In a saucepan mix: juice of orange and lemon, sugar, zest and half the necessary water. Bring to a boil, reduce on medium heat to boil for 5-7 minutes. Starch to dissolve in the remaining water and stir, pour into a saucepan, stir and remove from heat. Our sauce is ready, Bon appetit.

Serve sauce can be hot or cold. I was served hot with pancakes, ice cream, mint and almond shavings.