Crock Pot Broccoli Cheese Soup

Bahan-bahan (8 porsi)

• 1 tablespoon butter
• 1 large onion (chopped)
• ½ cup sliced celery
• 1 teaspoon garlic powder
• 1 bay leaf
• 4 cups chicken broth (or stock)
• 6 cups broccoli florets (about 2 heads)
• 4 ounces cream cheese
• 12 ounces evaporated milk
• 2 cups shredded sharp cheddar cheese
• ⅔ cup shredded Parmesan cheese
• salt and pepper to taste