Tomatoes are a fruit, they also have a shitload of sugar. Onions have a lot of sugar, Mushrooms have almost none. Your list doesn't make sense.
I won't argue the list or not, or what you said above (yes, a tomato is a fruit).
But you don't really think you'll get fat eating tomatoes and onions, right?
Now, funny story on tomatoes, because I've been dying to get this off my chest.
This is one of my memories I have of junior kindergarten. I'm 3 years old (started early at my parent's insistance that I was gifted, which I'm not). So, I go to class, and at some point the teacher said "class, everyone bring a piece of fruit into class tomorrow, and we'll cut them all up and everyone can share in a class fruit salad (no homo)."
So, I get home and tell mom and dad all about it. My self-serving parents take it upon themselves to use this as an opportunity to show my teacher how "gifted" I am. They proceed to instruct their young son into the botany of what distinguishes a fruit from a veggie (i.e. it has seeds, grows from a flower, etc...). They tell me "snx, a tomato is a fruit. Did you know that?". Of course I didn't, and smile. Then my parents tell me that I'm going to bring a tomato to school to show the whole class that tomatoes are fruits.
So there I go, trusting my parents, with a couple of tomatoes packed into my lunchbag. Teacher calls for the fruits, and one-by-one, kids head up to the front of the class to put their fruits on the table. There are pineapples, apples, oranges, pears, berries of all colors, even coconuts. Then I walk up and plop down my tomatoes. The teacher looks at me quizzically and says "snx, you know it's a fruit salad. We need fruits. These are vegetables". To which I opine, "but Mrs. Beauchamps, these ARE fruits. They have seeds, and sprouted from flowers, etc..."
I can't remember if she agreed with me, thought I was a smartass, or a stupid kid. But she purposefully set the tomatoes aside, made up the fruit salad. And all the little boys and girls got some, except me and the other kids who didn't bring in a fruit.
I went home and told mom and dad, and they just shook their heads in derision at the stupidity of the teachers at my school, and that I surely needed a more advanced program. I learned that day that being a smartass isn't all it's cracked up to be.