Memelas with Queso Fresco and Charred Tomato Sauce

Memelas with Queso Fresco and Charred Tomato SaucePhoto by John Kernick
Memelas are similar to chalupas and sopes. Pinching up the edges and creating tiny bumps in the centers helps keep the filling in place, which becomes important when the memelas are large.
Cooks' notes:
·Sauce may be made 1 day ahead and chilled, covered. Add cilantro just before using.
·Memelas may be prepared, without adding filling, 4 hours ahead, cooled completely, then chilled in a sealed plastic bag.