I have a constant supply of stock in my freezer it makes a base for my soups, stews, pies, sauces and risotto. You can lamb bones easily enough from your butcher or meat supplier at your local farmers market.
Prep: 30-40 minutes plus 2 hours marinating
Cook: 1½ hours
Prep: 5 minutes
Cook: 10 minutes
Prep: 10 Minutes
Cook: 5 to 6 minutes per batch