Edit: Just realized that Step 0 would be: spend a year or two in culinary school, or about 10-20 as a cook turned chef.
Step 1: Smoke yourself retarded to the point of getting the munchies, but do not eat anything for a month or so. This helps get rid of the munchies so you can focus on summoning Julia, or most of the time in my case it's more Cecilia Sun Yun Chiang (江孫芸)
Step 2: Smoke yourself to a comfortable level of high, but not totally retarded, and go in the kitchen and experiment.