Vegetable but if your talking about protein and sugar and starch and stuff then I am afraid I cant help you hope it helps :)
French fried onions are in the fats food group.
Onions are in the vegetable food group because it is an edible plant used for cooking or eating raw.
A bunch of onions
A group of onions is called a shallot. Hope it helped
Crackers would go in the grain food group.
A pear would go in the 'vitmins and minerals' food group because it is a fruit. All fruit are part of this food group.
The sweets group.
It goes in the diary food group
the milk group
Adding onions to a food to make the food taste good is a matter of personal preference. Onions help with the digestion of the person eating the food, though.
A grilled pork chop would go in the protein food group.
Yes, some Chinese dishes, such as dumplings, can have onions in them.