To “warm the cockles of someone’s heart” means to make them happy. One of the explanations of this expression may be that cockles are heart shaped. What do you think?
Cockles are rather small, so they cook quickly when grilling, poaching or sautéing them. We also like to steam them with a splash of lemon juice or white wine vinegar to let the clean taste shine through.
Cockles are a low fat, high protein seafood choice with healthful minerals such as Selenium, Zinc, Iron and Magnesium; plus B Vitamins like Niacin.