Chilled Cucumber, Spinach, and Avocado Soup - Healthy Living

Ingredients

• 2 Tbsp butter or vegetable oil
• 1 large onion
• 1 lb fresh spinach
• 5 cups vegetable broth
• 3 long, slender cucumbers
• 1 avocado
• 2 tsp fresh lemon juice
• 1 tsp lemon zest
• 4 Tbsp crème fraîche
• Salt and freshly ground black pepper, to taste
• Fresh chives or dill, for garnish