Pesto sauce is prepared from basil leaves, garlic and pine nut. If pine nut is not available,  you can use cashew nuts or pistachios. The sauce is used to make pasta and sandwich dishes. This sauce gives a tingling taste to pasta and makes it little different than regular pasta. The sauce can be also used in combination with tomato sauce for pasta. Since there is not much spices in it, kids too would love this pasta.