Follow these simple steps to prepare the Tangy Marinated Heart of Palm Salad:

1. Prepare the Hearts of Palm: Begin by opening the can of hearts of palm. Drain the liquid and rinse them under cold water. Slice them into 1/2-inch rounds and set aside.
2. Chop the Vegetables: Dice the cucumber, red bell pepper, and avocado (if using). Halve the cherry tomatoes and thinly slice the red onion.
3. Prepare the Herbs: Chop the fresh cilantro and parsley. These herbs will add a burst of freshness to the salad.
4. Make the Dressing: In a small bowl, whisk together the extra-virgin olive oil, red wine vinegar, lemon juice, Dijon mustard, and minced garlic. Season with salt and pepper to taste.
5. Combine the Ingredients: In a large mixing bowl, combine the hearts of palm, cherry tomatoes, red onion, cucumber, red bell pepper, cilantro, and parsley.
6. Add the Dressing: Pour the dressing over the salad ingredients. Gently toss to ensure everything is well-coated with the marinade.
7. Marinate: Allow the salad to sit for at least 15 minutes before serving. This will enable the flavors to meld together.
8. Serve: Transfer the salad to a serving dish and enjoy this refreshing treat.