i have a bathrrom sink that i love and it is without the sink part and i want to make it into a cabinet for the kitchen to put my microwave on and have more storage …..i need ideas ….i know i need to cover the area where the sink was but what next help please

The question is how much are you willing to spend?
you can go to home depot and they have vanity tops you can cut to size. or you can tile it wich is probably the cheapest way to go (materials also available at homedepot)