The spring onion is a personal favorite ingredient, all though I would have a difficult time arguing why it's better than the regular onion. I use them in the same situations, when ever I make a pot, I try to include spring onion. Same if I fry vegetables as a side dish. I have included spring onion when I have made various sauces. And of course inside the burger meat. Is it the green color? Is it the natural portion sizes? The mild taste? The crispiness? What ever it is, I try to always have a spring onio ready when I cook.