How do you make a saddle type solid?

 From:  cc (CCLENK)
So, how do I do this?

I have two potato chips ( surfaces that are curved in two directions) of different outlines. I want to stitch them together into a solid.

Apparently loft doesn't work on curved surfaces. Network didn't work either.

I tried adding some lines to connect the two surfaces for network. Didn't seem to notice.

This reminds me of the bathroom cotton holder thingy that someone here modeled. Do I need to trace some curves and network them? Which way should they go? 2nd day on MOI, not so adept at tracing curves on odd planes.