What is bistro sauce?

Bistro sauce is typically a creamy, herb-infused sauce made with a base of mayonnaise and sour cream or yogurt. It is often used as a dip or spread for sandwiches and burgers, or as a topping for grilled meats and vegetables. The exact recipe for bistro sauce can vary, but it usually includes a mix of herbs such as chives, parsley, tarragon, and dill, as well as other ingredients like garlic, lemon juice, and Dijon mustard. Some versions of bistro sauce may also incorporate capers, cornichons, or other types of pickled vegetables for added flavor and texture.