Rinse the sea grapes thoroughly under cold water to remove any sand or debris.
Soak the sea grapes in cold water for about 10 minutes to maintain their crisp texture. Drain and set aside.
Thinly slice the cucumber and red onion.
Chop the tomatoes and slice the green chilies if using.
In a small bowl, combine the coconut milk, lime juice, salt, and black pepper. Mix well to combine.
In a large bowl, combine the sea grapes, sliced cucumber, red onion, tomatoes, and green chilies.
Pour the dressing over the salad and toss gently to combine.
Garnish the salad with chopped fresh cilantro or parsley.
Enjoy your meal!