Lamb Shanks with Potatoes

Name: Lamb Shanks with Potatoes
Ingredients: 1 can (15 ounces) crushed tomatoes in puré e; 3 tablespoons tomato paste; 2 tablespoons apricot jam; 6 garlic cloves thinly sliced; 3 strips orange zest; 3/4 teaspoon crushed dried rosemary; 1/2 teaspoon ground ginger; 1/2 teaspoon ground cinnamon; Coarse salt and ground pepper; 3 1/2 lbs. lamb shanks trimmed of excess fat and cut into 11/2-inch-thick slices; 1 1/4 lbs. small new potatoes scrubbed well, halved (or quartered, if large); 2 tablespoons butter; 2 packages (10 ounces each) fresh spinach rinsed, tough ends discarded ground nutmeg; Coarse salt and freshly ground pepper