Yes you can roast beef and lamb together. That's what they do in NewZealand.
You should give steak and roast pork
Roast leg of lamb how long to rost weight 2.478 kg
You would need to roast a lamb by first setting the oven to 350 degrees and salting the lamb's surface. After the oven is preheated, you can roast the lamb for about two and a half hours
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Roast lamb is still very popular in England . We usually have it with a mint sauce or marinade whch compliments the meats textures and flavours.The lamb is usually served sliced with roast potatoes and several vegetabls.
Roast Lamb or Standing Rib Roast of Beef.
Look in the link I will place below
mint sauce
When you have had a meal of roast lamb, it will be digested completely in 24 hours.
A leg of lamb is the whole leg taken from the rear of the animal, in the UK it is often roasted and served at Sunday lunch for all the family to enjoy. It should not to be confused with the front leg which is known as a shoulder of lamb.
Nz lamb roast