Make the dressing: In a medium bowl, combine extra virgin olive oil, lemon juice, vinegar, salt and sumac. Whisk them well to combine.
Combine the salad ingredients: In a large bowl, combine black eyed peas, chopped green onions, parsley, dill, tomatoes and cucumber.
Assemble: Pour the dressing over the salad and toss well. Taste and make adjustments if needed.