This is the first time I've done this, but I am going to recommend something controversial here. The Potato Diet. Don't beat me up (Paleobird...), I won't make a habit of it!
Anyway, many who have tried the Potato Diet, see
http://www.marksdailyapple.com/forum/thread72366.html or
http://www.marksdailyapple.com/forum/thread67137.html have reported a new found relationship with food and hunger. Since you are just wanting to re-establish that link and maybe not just wanting to drop 4 or 5 lbs, you could use any food really.
With the Potato Diet, the user makes a conscious decision to eat only one food (potatoes). All other choices are off the table, so to speak. After a day or two, many report they no longer have much interest in eating and can truly wait until they are hungry to eat again. After one eats, there are no snacking options--except more potatoes--and that drives the desire to snack away in a hurry.
Many have also reported that after 5-7 days of just potatoes, they have a new-found respect for eating and hunger signals. Those after-dinner handfuls of almonds or sneakily eaten cheeses aren't so appealing any longer. Emotional and habitual eating patterns are HARD to break. You really have to try hard to break them. The potato diet is a fairly healthful, short-term way to re-establish your relationship with food. Try it for a couple days at least, you never know!