Scalloped Potatoes with Parsley Sauce - Kosher.com

Ingredients

• 4 medium or 6 small potatoes (a little more than 1 pound/500 grams)
• 4 small or 2 large sweet potatoes (1 and 1/2 pounds/680 grams)
• 2 onions
• 1/4 cup Gefen Olive Oil, plus more for drizzling
• 1/4 cup Glicks Flour
• 1 cup unsweetened soy milk
• 1 tablespoon parve chicken soup mix
• 1 and 1/4 cups boiling water, divided
• salt, to taste
• pepper, to taste
• paprika, to taste
• 1 small celery root, peeled, cubed, and cooked in a little water until soft
• 2 tablespoons Gefen Olive Oil
• 2 tablespoons Glicks Flour
• 1 teaspoon mustard
• 3 tablespoons fresh parsley, chopped
• 1 teaspoon fresh lemon juice or Tuscanini Lemon Juice (optional)