Prepare sandwich components: 7" Baguette, sliced cucumbers, sliced fresh jalapeños, cilantro, slaw dressed with rice wine vinegar and sugar.
Combine all crabmeat ingredients in a large bowl. Form into 2" balls, flatten to an inch thick. Pan fry crab cakes in oil until sides are light brown and crisp, 3 minutes on each side.
Spread sriracha mayo on both sides of sliced baguette. Put 2 or 3 crab cakes on sandwich, topped with the hearty slaw and cilantro leaves. Arrange layers of cucumber slices first, then jalapeños on top of slaw.