Depending on the recipe, you can use onions or green onions in place of leeks. It won't be identical but it can be close.
You could substitute any type of onion you want, because scallion is an onion. I recommend a green onion because they are practically siblings.
you can , but depending on what you are preparing it could create different thing all together. but try it may be better!
Leeks or shallots depending on the recipe.
Technically sure, but leeks are a lot milder than a normal onion. You will likely have to add a little more than you would of normal onion to get a comparable flavor.
You can use onions in a recipe instead of leeks, yes.
Many people prefer to use onions because leeks are harder to clean as they can be full of grit, even after you cut it open.
Shallots.
Endive, shallots, fennel, and leeks
Some people may say that onions or shallots are a good substitute, but be careful: they may give a strong unwanted flavour where a more subtle flavour would have been better.
I can't think of a spice to substitute chives, but you should be able to substitute chives with spring onions or small and very finely diced shallots.
related but not alike. shallots are a small bulb like an onion but spliting into smaller segments like garlic - also tasting somewhere between onion and garlic. leeks are a thick stem like an overgrown spring onion. they are fibrous and need cleaning and cooking. milder than onions they have an earthey flavour that penetrates and works with other root veg and herbs.
Chopped onion, chopped leek, or chopped shallots. Amount remains the same.
Onions are the edible bulb from a genus of plants called Allium. Onions are a vegetable and are related to garlic, shallots, leeks, scallions, chives, and green onions (underdeveloped scallions).
Chopped onion, chopped leek, or chopped shallots. Amount remains the same.
http://www.newton.dep.anl.gov/askasci/gen06/gen06199.htm this website is helpfull with understanding what foods have sulfur in it
Tagalog for shallots: sibuyas na pula
Shallots are sweeter and milder relatives of the onion, sort of in the way that a yam is related to the potato. http://en.wikipedia.org/wiki/Shallots
Welsh leeks may be larger or smaller than leeks grown elsewhere, but leeks are leeks.
Leeks are a vegetable related to onions.