Five minutes the night before, and breakfast is waiting in the fridge. Stir it twice: once when you mix it, and again ten minutes later, or it sets in clumps.

Chia pudding is one of the few breakfasts that is genuinely better made the night before, and it holds its texture for three days, so one batch covers most of a working week.
Chia seeds absorb many times their own weight in liquid and turn it into a gel. That gel is mostly soluble fibre, and a portion here carries around 10g of fibre, a third of the 30g a day UK guidance recommends. Soluble fibre slows how quickly the sugar in the mango reaches the bloodstream, which is why the pudding keeps you full longer than fruit and cereal with a similar number of calories.
Chia is also, with flaxseed, the richest plant source of ALA, the plant form of omega-3. The honest limit: the body converts only a small share of ALA into the EPA and DHA found in oily fish, so chia adds to fish rather than replacing it.
The milk matters more than it looks. Unsweetened soy milk brings about 6g of protein a glass, and it is soy, so it carries isoflavones; what those can and cannot do after menopause is covered in how to increase oestrogen naturally. Check the label for calcium. Many organic plant milks are not fortified, because organic rules restrict added vitamins and minerals, and calcium is the reason to choose soy over plain water after menopause, when bone loss speeds up: protecting your bones.
Pumpkin seeds add magnesium and zinc and a crunch the pudding needs.
At 15g of protein this is a solid but not a high-protein breakfast. For more, stir 100g of Greek yogurt through each portion before topping it (not vegan, but it adds about 9g), or make the tofu scramble. For another make-ahead breakfast, see overnight oats with flaxseed.