Chicken and Broccoli Soup

Ingredients

• 3 Tbsp unsalted butter
• 1 1/4 cups thinly sliced leek (white and green parts only)
• 3 medium carrots (chopped)
• 2 medium celery stalks (chopped)
• 4 cloves garlic (chopped)
• 4 Tbsp all-purpose flour
• 4 cups unsalted chicken broth
• 1 1/2 cups whole milk
• 3 cups shredded cooked chicken breast
• 1/2 tsp pepper
• 1/4 tsp salt
• 2 Tbsp lemon juice
• 3 cups broccoli florets (about 8 ounces)