Cheesy Herb Potato Casserole Recipe

Ingredients

• 3-4 lg. potatoes (very thinly sliced)
• 1 cup thinly sliced onion
• 1 cup shredded reduced-fat sharp Cheddar cheese
• 1/2 teaspoon Italian herb seasoning
• 1/2 cup stock or reduced-sodium broth
• 1 1/2 teaspoons Dijon mustard
• 1/2 teaspoon garlic salt
• nonstick cooking spray