That is great rob, I love it when parents take the time to teach their kids to cook properly, its so much better than relying on takeaways and just buying processed foods full of crap.
Both ours can cook and are pretty good now, both early 20's.
We never taught them formally, but they'd watch and ask and then try it themselves, sometimes asking for a bit of guidance along the way.
Daughter has gone from being extremely fussy to eating things we never thought possible. She's mainly veggie, but vegan in Januarys and cooks up some fantastically tasty stuff.
Son isn't veggie, but massively into cooking healthy stuff from scratch.
They both really care about what they eat and we know that they'll never starve and never be reliant on junk or processed crap.
Financial education and food education/nutrition would save the country a fortune in the long run.
Seeing them both cook makes me happy - even more so when they cook for me