Green pea, spinach & avocado soup - Trois fois par jour

Ingredients

• 2 tablespoons butter
• 2 cloves garlic, minced
• 1 medium onion, roughly chopped
• 4 cups spinach
• 2 cups frozen peas
• 3 cups vegetable or chicken broth
• 1 large very ripe avocado
• A few basil leaves, to garnish
• Salt and pepper