Beef Marsala and Scalloped Potato Casserole

Ingredients (15)

• 1 lb ground beef
• 1 medium brown onion
• 1 tbsp olive oil
• pinch of salt
• pinch of ground black pepper
• 1 tsp garlic powder
• 2 tbsp flour
• 1/2 cup sweet marsala wine
• 1/2 cup beef broth
• 1/2 cup cheddar cheese
• 1 4.7 oz box of scalloped potatoes
• 1/3 cup milk
• 2 cups boiling water
• 1 tbsp butter
• parsley for garnish