If you see cooking primarily as a means of getting nutrients rather than a hobby, I very strongly recommend getting an electric pressure cooker. It greatly simplifies cooking because it's automated. Just add the ingredients, close the lid, press a button, and wait. You will get a perfectly cooked one-pot meal with minimum effort. You can even mix fresh and frozen ingredients and the timer won't start until the frozen ingredients are thawed. If you don't overfill it the only thing the food touches is the inner stainless steel pot, so it's very easy to clean. I get the majority of my nutrition from food cooked this way. I can't imagine going back to slow traditional methods.

It also makes dried legumes far more practical, because you can skip the pre-soak phase. If you eat a lot of legumes, and you switch from canned to dried, the savings will most likely pay for the cost of the machine within a few years. In addition, energy costs are reduced because cooking at increased pressure is faster, and good electric pressure cookers are insulated. I am happy with an Instant Pot brand one, although I don't guarantee they are the best. If somebody has strong opinions on which is best then please post them.

The one major downside is the texture of the food can become boring, because everything is mixed together and you can't make crispy foods with it, but you can always add things like pickles after you've cooked it.