Easter is the principal festival of the Christian year. Both Easter and its long prelude Lent have traditions associated with food. Lent is traditionally a time of giving up food, especially meat and dairy. Easter is, by contrast, a feast.
Versions of simnels (high-quality bread), decorated eggs, pancakes, and roast lamb can all be found in medieval European culture. Whether hot cross buns come from the same period is open to question. Some argue that hot cross buns come from St Albans buns, apparently invented by the monk of St Albans Thomas Rockcliffe in the mid-14th century.