I used to be your friend. I “did not do” vegetables. Tomatoes in tomato sauce form only. Most potato preps were fine. Other than that, the only green in my diet as a kid was lime popsicles. There was no such thing as AFRID back in the 70’s. But I was a kid with special health issues already, and was a classic ‘picky eater’, to the point I was seriously underweight. My doctors advised my parents “If he’ll eat mac and cheese, let him eat mac and cheese. Give him a flintstone’s chewable and he’ll probably grow out of it.” So they did. When my family got chinese food, much like your friend only eating the meat of the dumpling, I only wanted the fried outsides of the big, midwestern style eggrolls. All that cooked cabbage and whatnot inside? HELL NO.
Eventually (like, in my early 20’s), I went to an elegant B&B in Lower Waterford, VT called The Rabbit Hill Inn. They had a very accomplished chef on premises, and my then spouse pleaded with me to please just TRY the Ceasar salad, it was mostly cheese and croutons. I did. I failed to die. I failed to need to sprint to the restroom to wretch. It was… good!
I have since (slightly) expanded. I am still not fond of MOST cookied veggies. I find their textures offputting. I LOVE all sorts of salad greens, from bitter, tender spring mixes to baby spinach to crunchy iceberg and shredded cabbage. Raw carrots in most forms. I’ll even do them in stir fries if they’re not in big chunks. Green onions. I’m still working on getting past the texture of cooked/grilled (as opposed to fried) onions. I now eat the entire eggroll, happily.
There are a few hard passes, more than most folks, I imagine. Asparagus (it tastes vile). Ditto broccoli and cauliflower. I don’t mind the flavor, but dislike the texture of bell peppers (of any color). And cucumber. Both the texture and the taste is something I CANNOT get past, and as a lover of cheap spicy-dragon-tuna-roll-with-garlic-sauce sushi, I’ve made my peace with asking for items without it.
Most things, I will, grudgingly, eat past. ex: green peas. I do not enjoy them. If they’re there and too cumbersome to eat around, I’ll deal. But I’d NEVER put them in food I make for myself. Ditto big chunks of tomato. I prefer my sauces smooth. If my partner and I are out and the salad comes with big tomato pieces, she’ll just stab them from mine into hers, unasked.
I have encountered adults my age and older who genuinely never grew out of their ‘kids menu’ food habits. I had a coworker who would only order chicken karaage at sushi places for lunch, and kept BBQ sauce packets in his bag, just in case.
People are weird, and furthermore, people are WEIRD about HOW they are weird. One person won’t eat vegetables. Another absolutely cannot use any bathroom except their own. Another has constructed ALL of his wardrobe choices to be predominantly yellow. Also his car, his cell phone, etc.
Thank goodness we’re all terribly strange. It’d be so boring otherwise.