Risotto With Lamb Casserole

• 10 baby asparagus spears
• 2 1/2 leg of lamb
• 1 follows
• 1,100 ml vegetable broth
• 1,100 ml water
• 350 ml dry wine (white)
• 230 gr tomatoes
• 180 gr arborio rice
• 40 gr parmesan (freshly grated)
• 1 gr saffron threads