These buttery, salty, savory open-faced sandwiches, halfway between a tea sandwich and a little canapé, and are great for serving for anything from an after-school snack to elegant party appetizer. They're easy to prepare, quick to assemble and bursting with flavor.
Technique tip: Don't stack the ingredients so high that it's hard to eat.
Combine cornichons, shallot, parsley, tarragon, lemon zest and lemon juice in a medium bowl; season with flaky salt.
Spread butter onto each piece of toast, and sprinkle with more flaky salt. Layer on the ham, followed by the herb mixture.