It's not evolutionary psychology so much, but I've seen quite a volume of evolutionary just-so stories in the field of diet and nutrition: everyone from raw vegans to proponents of diets based on meat and animal fats seems eager to justify their findings by reference to the EEA. Generally, the more vegetarian a diet, the more its proponents will focus on our living hominid relatives; the more carnivorous, the more the focus is on the recent evolutionary environment.