Preheat the oven to 355°F/ 180°C.
To make the caramel, place a pan (without a non-stick base) over medium-low heat with the water and sugar. Keep an eye on it for about 5 to 7 minutes as the sugar melts and slowly turns light brown. Do not stir it as it cooks as it could crystalize. Swirl the pan gently and don't let it burn!
Pour the caramel into your flan mold and set it aside.
In a blender or food processor, combine the eggs, condensed milk, evaporated milk ,and vanilla. Blend until the ingredients are well mixed and the mixture is creamy.
Pour this mixture into a flan mold on top of the caramel, then give it a few small taps on the table so that the mixture is balanced without any air bubbles.
Put the mold inside a high-sided baking tray, and fill the tray with boiling water from the kettle until it reaches halfway up the flan mold. Carefully put the tray inside the oven and bake for 40- 50 minutes, checking after 30. To see if it’s done, insert a sharp knife – if it comes out clean, it’s ready.
Leave it to cool at room temperature for about 45 minutes and then put it in the refrigerator for at least 3 hours, or ideally overnight.
When you are ready to serve, run a knife around the inside of the mold, tip it upside down on a plate, and remove the mold. The flan will slide out, covered in caramel. Serve it cold with cream, berries, and mint if you like.