Septy, that could just be a kid thing. My neice lived on chicken noodle soup, a friend's kid Rramen noodles, I think noodles at that age is normal. And skinny. Weird, huh? Noodle eating noodle kids......

But, re: food/eating, that's a good one. If there is a buffet situation, see what he grazes on, if anything different, and add it to regularly available choices. That's one way I found new foods. But, noodles have always been my favorite way to carbo load. I just add more good things to the pot and cover it all with cheese sauce or cream of mushroom soup or tomato sauce or_______ now that I am a clear* thinking adult.(*hehehe)

I also have success with making my own smoothies in a blender. Fruit and fruit juice diluted with water. (I am overwheled by straight fruit juice.) It comes out smooth and homogenous and nice colors. You can hide protein like tofu or soy milk in here too. But you'll probably just have to wait for him to outgrow the macaroni exclusivity.

Remember to not take his reactions personally, he's probaly trying to cancel further input as he's already too full to process what's already stimulated his senses. Fried. Like that: "One nerve left and You're standing on it" poster. Back off time.

When the ol' brain is done, the ol' brain is done. It recycles on it's own schedule. The sooner I get to quiet, the sooner it can start to recycle myself.
I am just now sorta getting the hang of my ryhthm. I tend to want to live way more life than I can cope with successfully......