Drop onions into boiling water, return to boil and cook for one minute.
Drain and cool onions in ice water.
Just slice off root and stem ends of each onion and peel gently.
Make a deep cross in the root end with a small knife (to keep onions whole while cooking).
In large frying pan over medium heat, heat the olive oil.
Add the parboiled onions, and toss for several minutes until lightly browned.
Add water to halfway up the onions.
Add 1/2 tsp. salts
Cover and simmer onions for 25 - 30 minutes until onions are fork tender.