How long to roast 700g pork belly?

Not really an answer, but I cut the belly into individual servings (appetizer) about 3" x 3" x 1" thick. I put in a slow-and-low oven (225F) for about 4 hours. I then broil the top for some crunch and eye appeal. As an appetizer I serve it on a bed (about 2 T) of creamed corn. Yes! That is the way I had it in Napa Valley at a famous restaurant (whose name inane momentarily forgot) located across the street from The French Laundry.
I only serve appetizer sizes due to the fat content and not to upset my cardiologist.