Creamy Chicken and Veggies Casserole

Ingredients

• 1 onion, chopped
• 1 tablespoon olive oil
• 2 tablespoons all-purpose flour
• 1 teaspoon dried thyme
• 1/8 teaspoon freshly ground black pepper
• 1/2 cup whole milk
• 1 (16-ounce) jar four-cheese Alfredo sauce
• 2 1/2 cups chopped cooked chicken
• 1 (16-ounce) package frozen broccoli, carrots, and cauliflower
• 1 1/4 cups shredded sharp cheddar, or havarti cheese
• 1/3 cup grated Parmesan cheese
• 1 cup all-purpose flour
• 1/2 teaspoon dried thyme
• 1/4 teaspoon baking powder
• 1/4 cup (4 tablespoons) unsalted butter, softened
• 1/2 cup shredded sharp cheddar, or havarti cheese
• 1/4 cup grated Parmesan cheese
• 1 large egg

Instructions

1. Gather the ingredients.
2. In heavy saucepan, cook onion in olive oil over medium heat until tender.
3. Add flour; cook and stir 3 minutes.
4. Add 1 teaspoon thyme leaves and milk; cook and stir until thick.
5. Remove from heat and add Alfredo sauce, chicken, 1 1/4 cups Cheddar or Havarti cheese, 1/3 cup Parmesan cheese, and the frozen vegetables; stir gently.
6. Place in a 2 1/2-quart casserole. Cover and refrigerate 8 to 24 hours.
7. When ready to eat, preheat oven to 375 F.
8. Place casserole, covered, in oven and bake for 25 to 30 minutes until warm.
9. Meanwhile, in small bowl combine flour, 1/2 teaspoon dried thyme leaves, baking powder, 1/4 cup butter, 1/2 cup Cheddar or havarti cheese, Parmesan cheese, and egg and mix with a fork until crumbly.
10. Uncover casserole and crumble this topping evenly over the top.
11. Bake for 20 to 30 minutes longer, until filling bubbles and the topping is golden brown and crisp.