I have been eating stuff like that for decades. It's easy and cheap.
Add in some quality red meat from time to time, because I can, a bit of chicken or fish and you're good to go.
It's easy because you just buy a bunch of veges, chop them up, cook them a bit, flavour it with chilli and garlic and whatever, and eat it.
I also like curry powder, coconut milk, peanut paste (butter), various soy and fish sauces. Mint, nuts and lemon juice is good too.
It doesn't matter how you cook them, or even if you cook them at all. My most used cooking device is the microwave. You can do great curries and "stir fry-like" cooking in the microwave.
If you eat mainly good cheap stuff then you can afford better quality cuts of meat and enjoy it more. You can also occasionally pig out on other stuff like cakes, pancakes and fish and chips because your primary diet is so good.
When you consider the vast majority of the world population eat like this (Asia, India, Middle-east, Islands), and a lot of those people are poor, then it's a piss poor excuse to say it is hard to do or expensive.
The only problem with eating all this good stuff is you get less tolerant of the crap served up in a lot of eateries. I would shut down all the fast food chains and mass produced food purveyors in a second.






PS I just turned 60. My test results (blood pressure, weight, cholesterol, etc) are off the scale at the good end. I just kite every day and go for the occasional walk with the missus. Life's too short to knock yourself doing dumb exercises when there's so much play to be had.