In our case, we did not reduce the number of meals per day but rather we decrease the amount per serving and also some ingredients for it. In that way we can still have the good number of meals per day and we can manage our finances so well. We are avoiding spending in house deliveries of foods and other items , maybe we will only by those things if there's special occasion. We prioritize things that we need over our necessities, inflation is hard here.
It's the same thing, whether you reduce the number of servings or just the amount per serving - you eat less food. Good, nutritious food is an absolute basic need and you shouldn't be looking to save on that, unless you're out of any other saving options. Especially when you have kids - the amount and quality of food will have a huge effect on their development. Many people don't fully realise that.
If possible, try eat as close to the nature as possible, avoid processed foods, grow your own fruits/vegetables and hunt/fish yourself, if you have such possibility.
Ordering takeaways is the worst option possible: it's hardly ever fresh (usually get saggy in the transport), almost always unhealthy (produced with cheapest ingredients/fried in an old oil etc) and much more expensive than cooking yourself. I'd drop that completely.
It is not wise to reduce the number of servings or whatever it is per day, because it is a basic need that we cannot reduce in my opinion. You see, we have to stay healthy and one of the ways to achieve that is by eating enough and being nutritious, health has to be prioritized because it affects everything, for example, working has to be healthy, right?
I agree with you that taking food in nature is a very good thing. You can start by growing your own vegetables, after all it's now easy to garden with modern farming methods. I think it's possible, it just depends on whether we want to do it or not.