Is What He Said Right??

I think changing food from time to time will not only be healthy, but your taste bud will improve as well

Since different foods have different nutrients he may very well be right. That being said, since what you eat is already healthy, you may feel like there is no need to get better than “very good”, health wise.

For me as someone who is such a very introverted person and minding my own business, If someone asked me to change my meal I would definitely take offence on it because It's my mouth and I can eat whatever I want. But if he is coming from a place of concern then definitely I will take his advice however, I wouldn't abruptly changed my meal plan just because I have some unsolicited advice from someone and he is not a dietician or a doctor to begin with. I'd take professional opinions by someone in that field.

I don't think it is really necessary, but personally I would get tired of eating exactly the same thing day after day. Although when you say 'green vegetables' you don't say whether those are always the same vegetables. Still, a variety of fruits and vegetables does provide a good mixture of nutrients. And the meal you have described looks as though it might be rather low in protein so I would suggest eating some more pulses such as beans or lentils. Are you vegetarian? You also don't mention what you eat for other meals so maybe you already have that covered.

I dont think changing food every day increases nutrition. But if you have masoor dal one day moong dal another day, cauliflower curry one day, cabbage curry another day it will keep your taste buds alive and you will love the variety of food

It is best to have a varied diet, so that you don’t get bored and your nutritional intake remains diverse and balanced.

I think it is a good idea to eat different foods, because there are different health benefits for different foods. So eating a variety of foods helps you get the benefits of those foods.