Island Grill Head Chef Adam Woolven Shares Professional Onion Tips. The Great British weather has begun to brighten and spring is truly on its way. Along with the warmer climate and longer days, spring brings with it (unsurprisingly) Spring Onions, which come into season in April in the UK. Adam Woolven, Head Chef at the award-winning sustainable restaurant Island Grill, shares his professional advice on how to make the most of your onions. Spanish Onions: The strongest in flavour and the least sweet of the bunch, Spanish Onions are a kitchen staple. Best used as a base flavour in any stew, sauce or soup, Spanish Onions should be diced or chopped roughly in order to get the most juice out of them. Chef Adam says it’s no coincidence we feel better after a healthy dose of hearty chicken soup when ill – Spanish Onions (which are often the base stock of a chicken soup) have innumerable health benefits for the immune system and allow us to recover from colds fa...