What sauce do you suggest to accompany this lamb? It is marinating in my fridge and I am super eager to serve it!

I like the simplicity of the jou along with a nice medium rare leg of lamb. In addition more as a side something like raita or tzaziki is nice too.

A mint sauce or mint jelly would work with this lamb recipe.

A white wine reduction sauce, with garlic and parsley.

Many choices, depending on what you like or have around.
• lemon sauces (with butter , garlic or tahini);
• rich sauces with butter or cream (Bearnaise, Hollandaise, peppercorn);
• herb sauces (single or combined) ~- mint, dill, parsley, pesto, chimichurri;
• tomato or fruit (salsa or the like).
Thekitchn site has an article on 16 sauces for lamb, with recipes.
Maybe start with one and move to others later in.
Or if you’re serving a big group a dinner, have two or three different one so people can choose.