A banquet is a very large formal dinner, usually with several courses, that is served to a large number of people at once. A less formal large dinner for many people is called a feast.

You chop something up by cutting it into pieces with something sharp like a knife or axe.

You dissolve a solid in a liquid by mixing the solid around until it seems to disappear. Once the solid is completely dissolved, the resulting solution behaves exactly like a liquid. Solids won't dissolve in any liquid, they must be soluble in them. For example, table salt is soluble in water but not in oil.

Solids that do not dissolve in a liquid but are mixed into a liquid can be removed with a filter. Filtering is an effective way to remove very fine particles of dirt from water.

A feast is similar to a banquet but is less formal. A feast is a very large, extravagant meal for any number of people. You can prepare a feast just for yourself if you want to.

Ganache is a mix of chocolate and cream. It can be used as frosting or filling for pastries and confectionary. It is made by pouring warm cream over diced chocolate and then stirring them together. Ganache is usually made with two parts chocolate to one part cream for filling, and equal parts for frosting or a glaze.