Remove seeds from cucumber, chop fine, put in colander, and add ¼ teaspoon salt. Let rest for 10 minutes to drain juice.Use paper towel to get excess moisture out.In a small bowl, combine the first seven ingredients.In another bowl, combine the sour cream, lemon juice, lime juice, cumin, and remaining salt. Pour over cucumber mixture and toss gently to coat. Serve immediately or chill. Serve with chips or can be used to top a pita pocket, fish or chicken.Tastes similar to Tzatziki sauce, the Greek sauce used with gyros.