What do award-winning cookbook author Rick Bayless , Food Network Iron Chef Bobby Flay, nationally acclaimed pastry chef Gale Gand , and Chloe, my granddaughter, have in common? They all began their culinary education by slaving over a hot light bulb. Chloe, just like those three celebrity chefs when they were youngsters, has been the recipient of an Easy-Bake oven, which, famously, can produce cakes, cookies, pies, and other goodies using only the heat generated by an ordinary 100-watt