Frozen fruit, milk, condensed milk, blender. That is genuinely the whole thing.
About 5 minutes from starting to sitting down, and it is straightforward. That is start-to-finish, so it works on a weeknight when you have not planned anything.
Use 120ml evaporated milk simmered with 100g sugar until thick.
You can prepare it a few hours ahead and reheat gently. It keeps two days in the fridge, though it is best on the day.
Yes, it is vegetarian. It is not vegan as written because it contains dairy; swap the dairy for a plant alternative and the rest of the method is unchanged.
That is exactly what this recipe is for. It uses a pressure cooker, a pan or the fridge instead of an oven, and the method here is written for that, not adapted from a baked version.
Eat now as soft serve, or pour into cups and freeze firm. Baking is chemistry, so scale it by weight rather than by eye: double every quantity, use a tin with roughly double the area, and expect to add ten minutes or so. Judge it by the skewer, not the clock.