After Julia Child stopped smoking weed and wearing headbands, the professional kitchen has been casting about for its own Arden Wohl, the free-spirited young socialite whose Cherokee-inspired headgear and sly self-depreca-promotion have catapulted her to the depressing stratosphere of socalitism. As Felix Gillette ably expresses in a classically absurd Observer article, personal chef and soon-to-be star of the Food Network Colombe Jacobsen might just be the woman.