Glurb's Bride is the 2nd quest that Glurb gives you to complete. It consists, of course, of feeding him even more food than you already have. You must feed Glurb 6 times and get at least 1 stardust from him. If he doesn't offer you stardust as a reward for any of the 6 meals, then you must continue to feed him until he gives you a stardust reward.