The term 'quiche base' can be broken down into two crossword solutions: eggs (4 letters) and EGG (3 letters). Eggs are a common ingredient in quiche, as they provide the base for the dish. EGG is also an important part of the quiche base, as it helps to bind the other ingredients together. Both eggs and EGG are essential components of a quiche base, and are often used in combination with other ingredients such as cheese, vegetables, and herbs.