Tarragon Lemon Summer Squash Soup

INGREDIENTS

• Tarragon, snipped chives, shredded Parmesan cheese, and croutons, for garnish (optional)
• 1 tablespoon butter
• 1/2 cup milk or cream
• 2 green onions (scallions), light green and white parts, chopped
• 1 tablespoon fresh tarragon leaves, chopped
• 1 garlic clove, finely minced
• 3 cups chicken broth, preferably homemade
• 1/2 tablespoon olive oil
• Juice of 1/2 large lemon
• Ground black pepper, to taste
• 1/2 medium onion, chopped
• 1 large yellow squash