Bliss is finding a soda machine housing an ice cold coca-cola at the top of a 4,000 ft climb...

while not exactly a conveince store food here (in Europe yes!) my favorite long haul food - prosciutto or serranno ham sandwiches - a great combo of protein carbs and relatively low in fat. They keep well with minimal/no refridgeration and don't upset my stomach. Top it off with some raisins and chocolate for the perfect bike touring lunch.