Sandwich is a globally loved food mainly consisting of two or more slices of bread. It is typically popular as packed food taken to picnics, school or work. Sandwich is a combination of cheese, various sauces, spreads, meat or salad vegetables. The English word 'sandwich' was first introduced in a journal of Edward Gibbon who was a member of Parliament. The word sandwich was referred to 'bits of cold meat'. In India first sandwich was introduced by British which was called double roti by Indians.
Burgers are like sandwiches but sandwich is made of plain flat bread and burgers are made of sliced rolled bread. Burgers consist of a cooked patty, cheese, lettuce, tomato, onion, condiments, mayonnaise and meat. It is served with different relish, ketchup or French Fries. Patty in a burger is the cooked ground meat or vegetables in round shape and is flattened like tikki in India. Here is a good collection of sandwich and burgers recipes for you.