Spice rub the salt for flavor and the sugar for caramelization. The simplest rub is just coarsely ground black pepper as in steak au poivre. Spice rubs can also have ingredients such as herbs, crushed garlic or oil added to make a paste. Less common ingredients can include coffee beans. Spice rubs are mainly used for preparing meats and fish. There are many different recipes for rubs and most of them are targeted towards a specific kind of food. The exact combination of spices that makes a good rub for a particular kind of food varies from region to region and culture
Genovese sauce brought by Genovese immigrants or merchants, at a time when Genoa and Naples were two of Italy's most important ports. It could also be referring to its inventor's name, since Genovese is a widespread surname in Campania. Genovese sauce is now unknown beyond Campania. The sauce's use of onions may reflect a French influence, and resembles Boeuf à la mode. During the mid 19th century, ‘Salmon in Hollandaise and Genovese sauce’ was served in the Grand Véfour restaurant of the Palais-Royal in Paris as a luxury dish. Genovese sauce is not to be confused with Pesto from Genoa and Liguria,