Both home-made and purchased Romesco Sauce have similar CHO.
There are almonds in the original recipe from Spain, but Sunflower Seeds, Pumpkin Seeds or cauliflower can be nut free replacements.
Scallops are so sweet and gentle in flavour, you want to be careful with any additions, except butter, salt and pepper.
See our Brown Butter Scallops Recipe, it's very easy to prepare. We serve this dish with Saffron Rice and a simple green salad.