Cucumber,
seeded and cut into 1/2 inch cubes 1 large
Peel
potatoes and cut into 1/2 inch cubes. Cook potatoes until
tender in a large saucepan of boiling salted water, about 5
minutes.
Drain
potatoes and rinse under cold water in colander. Drain
potatoes well. Stir together yogurt, dill, coriander, and
lemon juice in a small bowl. Combine with potatoes,
cucumber, and season with salt and pepper and toss to coat.