In a medium bowl, whisk the lemon juice and honey. In another bowl, whisk the yogurt and olive oil. Add the yogurt mixture to the lemon juice in a thin stream, whisking constantly. Add the mint, 1/2 tsp. salt, and pepper to taste. Chill, covered, for up to 24 hours.
In a large bowl, combine the spinach, cucumbers, and onion. Season lightly with salt and pepper and add just enough dressing to moisten the ingredients. Toss to coat, divide among eight plates, and serve, passing any extra dressing at the table, if you like.
nutrition information (per serving):
based on eight servings;
Photo: Scott Phillips