Parmesan Scalloped Potatoes

Why I Love This Recipe
Normally, I wouldn't dream of making scalloped potatoes in July. But the weather here has barely gotten out of the 60's the past few days and it made me want some comfort food. Next to chocolate, what better comfort food is there than hot, bubbly, cheesy potatoes?
Ingredients You'll Need
5 large russet potatoes, peeled
1/4 cup butter
1/2 cup chopped onions
1/4 cup flour
2 1/2 cups milk
1/2 teaspoon minced garlic
2-3 dashes hot sauce
1/2 teaspoon lemon pepper seasoning (no salt)
1 cup shredded parmesan cheese, divided
Directions
Preheat oven to 350 degrees F.; Spray a 2 Qt casserole dish with cooking spray and set aside.
Thinly slice the potatoes (I use a Salad Shooter for this, but you can use a food processor, a mandoline or just a knife) into a bowl of ice water and set aside.
Melt the butter in a medium sized saucepan over medium/high heat. Add the onions and saute until they are soft, but not brown, about 5 minutes. Stir in the flour and then slowly stir in the milk. Add the garlic, hot sauce, lemon/pepper, and 1/2 cup parmesan cheese. Continue to heat and stir until sauce is thickened and bubbly.