But I'm talking about a garage that is fitted between your countertop and the bottom of the cabinet. There are several styles from stainless steel and sleek to roll top and country looking. The appliances fit anonymously behind them. You can either go with an old-fashioned cast iron sink which is colored any way you want it. You can go with stainless steel or you could choose a solid surfacing material.
Cast iron is least expensive and the solid surfacing is most expensive.
It will cost you though, the solid surfacing sinks are difficult to keep clean. My gut feeling is this would be very difficult to maintain if, in fact, you did find and acceptable way to adhere the flowers to the ceramic tile. You could try one of the larger craft stores like A.C. Moore and tell them your idea and they will have the products you'll need if it's possible to do. Although I do think the pressed flower idea is unique. Let us know how it goes.