I've done this a couple of times on my oven (Bosch, drop down door). I had to get a special strong adhesive that can withstand intense heat (can't remember the name) from my local appliance repair shop, removed the door, cleaned away the old adhesive and, with the door lying flat, applied the new adhesive and carefully placed the inner glass on top and then gave it 24 hours to dry before putting the door back on.
David, December 2009