Mix cornstarch, flour, and seasonings until well blended.
Add beer, mix well.
Cut about 3/4" off the top of onion and peel.
Cut into onion 12 to 16 verticle wedges but do not cut through bottom root end.
Remove about 1 " of petals from center of an onion
You may want to separate the onion petals slightly, do not do this too much, you will destroy the onion
Dip onion in seasoned flour and shake gently to remove excess
Dip in beer batter
Dip in flour mixture again,
Gently place in fryer basket and deep-fry at 375-400º for 1 1/2 minutes.
Turn over, and fry an additional 1 1/2 minutes
Drain on paper towels
Place onion upright in a shallow bowl and remove center core with circular or apple corer
Serve hot with Creamy Chili Sauce