Even simple mixing can be a particularly prickly proposition for misguided overachievers. Tuna burgers are more vulnerable to overmixing than most foodstuffs. The pre-minced beef used for burgers ...

A tuna burger with lettuce and tomato on a sesame seed bun on a plate. - Froggery/Getty Images The true test of the home chef is knowing when to underdo it, even when going extra seems too enticing.