I'm going to try a recipe that I just found as the top Google result on the internet. It has no allergens and looks simple. Hope it comes out good.
INGREDIENTS
Marinade:
1/2 cup orange juice
1 cup white wine
3 cloves garlic, minced
2 teaspoons of fresh thyme or 1 teaspoon of dried thyme
2 Tbsp of fresh chopped rosemary or 1 Tbsp of dried rosemary
1/4 teaspoon of fresh ground pepper
2 Tbsp olive oil
Blend ingredients in a blender, just a few pulses until well mixed.
Lamb Roast:
1 (6-pound) leg of lamb, bone-in or boneless. If boneless, the leg should be tied up with kitchen string by butcher.
Marinade
Salt