History has it that John Montagu, the 4th Earl of Sandwich, ordered a waiter to serve a portion of roasted beef between two slices of breads so that he can eat conveniently while playing cards with friends. Thus was born the most convenient and delicious food item of all times – sandwich. The food item that originated in the kitchen of the 18th century English nobleman is currently the most famous food in almost every home, restaurant and cafe. However, over time gourmands converted the simple sandwich into comfort food for epicureans loading it with tones of calories. For the health conscious, here are some delicious low calorie sandwich recipes that provide less than 350 calories.