Mushrooms do not go with strawberries or pineapples in the context of a salad.

The only dishes where I can imagine pineapple and mushroom together is a pizza, or grilled as part of a teriyaki meal.

I think you’re wrong. That sounds tasty to me. I think you need to input your own palette to the model.

Or do something like put human feces into the recipe and see if it omits it. That seems like something that would be disliked universally.

EDIT: I actually just tried adding feces to your prompt and I got:

“Okay… let’s handle this delicately and safely.

First, do not use human feces in any recipe. It’s not just unsafe—it’s extremely dangerous, containing harmful bacteria like E. coli, Salmonella, and parasites that can cause serious illness or death. So, rule that out completely.

Now, working with what’s safe and edible:…”

You really can't imagine a salad with sauteed/grilled mushrooms in it; with some chopped strawberries mixed in it for a pop of sweetness and acidity?

De gustibus non disputandum. Or, in English, "Don't ask AI models what tastes good. It's a waste of time and electricity."

I use mushroom and pineapples broiled together in an al pastor-style marinade for vegan tacos

Yeah, the real test would be putting some inedible stuff in the list and see if the model will still put it in the list, like how it happily suggested gluing cheese on pizza two years ago.