The secret to delicate-tasting lamb lies in the cooking time, temperature and marinade. Cooking in an oven-roasting bag helps ensure the lamb stays moist, and it enhances your lamb roast's full favor.
This self-basting process eliminates the need for additional fat or oil, resulting in lower-calorie cooking. Oven bags also lessen mess and clean-up because you just have to place vegetables and flavorings inside the bag. Plus, they help cut cooking time, making them an energy-efficient preparation method.
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Cooking Times Chart for Lamb in an Oven Bag
Cooking Time at 325 F
2 to 4 lbs. (1 to 2 kgs.)
1 to 1 1/2 hrs.
4 to 5 lbs. (1.8 to 2.2 kgs.)
1 1/2 to 2 hrs.
7 to 8 lbs. (3 to 3.6 kgs.)
1 hr. 45 mins. to 2 hrs. 15 mins.
How to Cook Lamb in an Oven Bag
Things You'll Need
Leg or rack of lamb
Large oven-roasting bag ($4.97, Amazon.com)
1. Bring Lamb to Room Temperature and Preheat the Oven
Lamb should be at room temperature before cooking it to help it cook more evenly. If your lamb is frozen, defrost it in the fridge. Once it's thawed, let it sit out on the counter for about 30 minutes, and no longer than 2 hours, to come to room temp.
Preheat the oven to the recommended temperature indicated on the roasting bag manufacturer's package instructions. Typically, this is around 325 degrees Fahrenheit.
2. Prep the Veggies
Potatoes and onions are some ingredients that go well when cooking lamb. Wash and cut your vegetables into quarters, and then set them aside.
3. Prep the Lamb
Place the lamb on a clean cutting area. Rub the lamb's surface with a mixture made from spices of your choice. Try the following herbs and spices to season lamb with: Chopped fresh mint, rosemary and thyme leaves, minced garlic cloves, olive oil and a sprinkling of pepper and sea salt.
Rubbing the lamb with olive oil before roasting helps prevent leaner lamb cuts from drying out during the cooking process.
Do not wash raw lamb before cooking it — doing so may spread food bacteria in your kitchen, per the USDA.
4. Bake the Lamb in the Oven Bag
Put the seasoned lamb into a large oven bag. Set it in a large roasting pan and add the cut vegetables.
Seal the bag, place the roasting pan in the oven and follow the suggested cooking time recommended on the bag manufacturer's package directions.
5. Let the Lamb Rest
Carefully cut open the oven bag, using scissors, to avoid a burn from released steam. Remove the lamb from the bag, place it on a serving platter and allow it to sit for 15 minutes, covering it with foil to keep it warm.
6. Place the Veggies Back Into the Oven
Turn the oven off and place the roasting pan back in the oven for the 15-minute waiting period. This keeps the vegetables warm and allows them to crisp around the edges.
Remove the vegetables from the oven and place them, along with some attractive garnish such as fresh mint, around the lamb on the serving platter.
You can pour the hot lamb roasting juices from the oven bag into a separate serving bowl to serve as a stock for drizzling over the meat and vegetables.
Lamb Recipes and Serving Ideas
Try these tasty lamb recipes:
- Lime and Mint Shredded Instant Pot Lamb
- Lamb Shakshuka
- Lamb Stuffed Kale Leaves
- Lamb Riblets recipe
- How to Cook a Roast Lamb With a Microwave Oven
Try these side dishes to serve lamb with: