In a small bowl, combine the olive oil, lemon juice, shallot, preserved lemon, and crushed red pepper, and season with salt and pepper.
Arrange the melon slices and blackberries on a platter. Drizzle the dressing over the fruit. Garnish the salad with the feta and snipped chives and serve. Looking for more quick and easy recipes? Check out our quick family-favorites, fast dinners for weeknights, and healthy recipes for less than $3 a serving.