Curried-Egg-Butter Tea Sandwiches

1. Mash egg yolks with vinegar until smooth. Stir in butter, yogurt, curry powder, jalapeno, and cilantro. Season with 3/4 teaspoon salt and 1/2 teaspoon pepper. Spread on bread, layer with sliced cucumber, and cut into triangles.

Cook's Notes

For hard-cooked eggs that are creamy and tender, not rubbery, place eggs in a saucepan and cover with cold water by 1 inch. Bring to a boil over high heat; cover and remove from heat. Let stand 8 minutes, then transfer to an ice-water bath.