How Long do I need to cook a 3.7 lb leg of lamb?

**For a 3.7 lbs (1.7 kg) leg of lamb roasted at 350°F (175°C), you'll need approximately:

- 1 hour and 15 minutes for medium-rare (internal temperature of 135°F or 57°C)

- 1 hour and 30 minutes for medium (internal temperature of 145°F or 63°C)

- 1 hour and 45 minutes for medium-well (internal temperature of 155°F or 68°C)

- 2 hours for well done (internal temperature of 165°F or 74°C)**

Please note that cooking times can vary depending on the oven and the specific cut of lamb. It is recommended to use a meat thermometer to ensure the desired doneness.