Creamy Arugula Soup - Litchfield Farmers' Market

Ingredients

• 1 tablespoon extra-virgin olive oil
• 1 yellow onion, chopped
• 2 stalks celery, chopped
• 3 cloves garlic, minced
• 1 pound yukon gold potatoes, chopped into 1-inch chunks
• 4 cups water or vegetable broth
• 1 1/2 teaspoons fine sea salt
• 3 cups fresh arugula
• 1/2 cup coconut milk or half and half
• Freshly ground black pepper