Step 1: Combine Olives and Pickled Vegetables: In a large bowl, gently combine the chopped green olives, black olives, and giardiniera. Ensure that the giardiniera is well-drained to prevent a soggy salad. This foundational mix provides the primary flavors and textures.
Step 2: Add Capers and Garlic: Add the drained capers and minced garlic to the bowl. Capers contribute a briny note, while garlic introduces a pungent aroma that enhances the overall flavor. Distribute evenly.
Step 3: Incorporate Herbs and Spices: Sprinkle the chopped fresh parsley, dried oregano, and red pepper flakes (if using) over the olive mixture. These herbs and spices add complexity and depth to the flavor profile. Gently toss to combine.
Step 4: Dress with Oil and Vinegar: Pour the extra virgin olive oil and red wine vinegar over the mixture. The olive oil enriches the salad, while the red wine vinegar provides a tangy counterpoint. Toss gently to coat all ingredients evenly.
Step 5: Marinate: Cover the bowl and refrigerate for at least 2 hours, or preferably overnight. This allows the flavors to meld and deepen. The longer the salad marinates, the more flavorful it becomes.
Step 6: Serve: Before serving, stir the salad to redistribute the oil and flavors. This olive salad is now ready to be used as a filling for muffuletta sandwiches or as a flavorful addition to other dishes.
Optional Tip: For a milder flavor, soak the olives in water for 30 minutes before chopping. If giardiniera is unavailable, substitute with a mix of pickled carrots, celery, and cauliflower.