Mashed Potato Casserole

Ingredients (10)

• 1 1/2 pounds russet potatoes
• 1 1/2 pounds red potatoes
• 1/3 cup 1/2 and 1/2
• 1/3 cup chicken broth
• 1/2 cup unsalted butter
• 1 small garlic clove
• 1 1/2 tsp. Dijon mustard
• 1 1/2 tsp. salt
• 3 large eggs
• 2 T. finely chopped fresh chives