Creamy Arugula Soup

Ingredients (for 4 servings)

• 1 tbsp — Extra-virgin olive oil
• 1 whole — Yellow onion, chopped
• 2 stalk — Celery, chopped
• 3 clove — Garlic cloves, minced
• 1 lb — Yukon gold potatoes, chopped
• 4 cup — Water or vegetable broth
• 1.5 tsp — Fine sea salt
• 3 cup — Fresh arugula
• 0.5 cup — Coconut milk
• 0 to taste — Black pepper