Home made mint sauce. Loads of leaves in a blender with white wine vinegar.
Used to make this stuff back in Durham for the Sunday roast but with sugar in too. I love vinegar so I don't miss the sugar making this sauce Paleo. There's a jar of thick stuff in the fridge to spoon onto lamb and a bottle of mint vinegar dressing too. Beats the shit out of Paul Newman's low fat high fructose corn syrup laced thousand island.