Avocado Chicken Casserole

Ingredients

• 1/4 cup butter, cubed
• 1/4 cup all-purpose flour
• 1/2 teaspoon salt
• 1/4 teaspoon each garlic powder, onion powder, dried basil, marjoram and thyme
• 1-1/2 cups 2% milk
• 1 cup half-and-half cream
• 8 ounces medium egg noodles, cooked and drained
• 3 medium ripe avocados, peeled and sliced
• 3 cups cubed cooked chicken
• 2 cups shredded cheddar cheese