Potato Spinach Gratin

Ingredients

• 2 lbs small white potatoes, scrubbed and sliced THIN (about 7 cups sliced)
• 10 ounces frozen chopped spinach, thawed and squeezed dry
• 1/8 - 1/4 cup minced onion
• 2 garlic cloves, crushed
• 2 cups half-and-half
• 2 tablespoons butter, melted
• 1 1/2 - 2 cups shredded cheddar cheese (or a combo of both) or 1 1/2-2 cups shredded monterey jack cheese (or a combo of both)
• 1/2 teaspoon kosher salt
• 1/2 teaspoon black pepper
• 1/4 teaspoon paprika
• 1 teaspoon parsley flakes
• 1 dash hot sauce (or use more or don't use any)