Preparation

Step 1 out of 6

Preheat oven to 400°F and lightly grease a 9"×13″ pan or casserole dish.

Step 2 out of 6

In a large skillet, melt butter over medium heat. Add onion and cook until starting to brown. Stir in garlic and cook one minute.

Step 3 out of 6

Sprinkle in flour, cook and stir until combined (you shouldn’t see any flour left).

Step 4 out of 6

Whisk in broth, cream and milk, and continue cooking and stirring over medium heat until thickened. Stir in one cup Parmesan cheese, chives, salt, and pepper.

Step 5 out of 6

Combine potatoes and carrots in prepared pan and pour sauce over top, spreading evenly. Sprinkle with remaining 1/2 cup Parmesan cheese, cover with foil and bake at 400°F for 50 to 60 minutes until potatoes and carrots are tender.

Step 6 out of 6

Uncover and broil until top is lightly browned. Let sit for 10 minutes before serving (will continue to thicken as it sits).