Puree capers, anchovy paste and garlic for the vinaigrette in a food processor. Add vinegar and oregano; pulse to combine. Slowly drizzle in oil and blend until emulsified. Season with pepper.
1-1/2 tbsps. capers, 2 tsps. anchovy paste, 2 tsps. minced garlic, 1/4 cup red wine vinegar, 1 tsp. ground oregano, 6 tbsps. extra virgin olive oil, black pepper
Mix together cooked pasta, cucumbers, tomatoes, mozzarella, salami, onion, olives, pepperoncini, roasted peppers, artichoke hearts and capers for the salad in a large bowl. Toss with vinaigrette to coat. Refrigerate overnight; just before serving season with salt and pepper.
2 cups seeded, sliced cucumbers, 1 cup halved grape or cherry tomatoes, 1 cup diced, smoked mozzarella cheese, 1 cup diced, Italian salami, 1 cup thinly sliced red onion, 3/4 cup pitted, chopped Kalamata olives, 1/2 cup sliced peperoncini, 1/2 cup sliced, roasted red peppers, 1/2 cup marinated artichoke hearts, 2 tbsps. capers