Does anyone know of an air ticket search engine which does the following in one search?

For a given set of dep/ret dates, find all available tickets on all airlines from a given US gateway to all European gateways reachable in two or less stops, and then list them in order of price.

For example: list by price all tickets available on all airlines lv May 12 ret June 20 from DSM to any European airport in two or fewer stops.

This is something I'd love to be able to do. I've found that sometimes the cheapest way to get to a given city in Europe is to look for the cheapest ticket from my US airport to any European gateway, and then get a separate cheap ticket from that city to my final destination city. But the only way I know to find out the cheapest ticket to anywhere in Europe is to log on to Kayak or Orbitz, etc., and search for a ticket to AMS, then search for a ticket to BRU, the search for a ticket to LHR, etc... and so on all through all the European air ports I can think of -- and there's always the possibility I might be missing some.

If anyone knows a site that does this, or a way to use an existing site to do this that I haven't figured out yet, pleas post. Thank you!