Parmesan & Parsley French Toast with Hollandaise Sauce

Ingredients

• 8 large slices of Country White Sourdough
• 4 eggs, beaten, plus the whites from the hollandaise
• ½ teaspoon Kosher salt
• ¼ teaspoon freshly ground black pepper
• ¼ teaspoon onion powder
• 1 tablespoon fresh chopped Italian parsley, plus extra for serving
• 1 cup shredded Parmesan
• 1 tablespoon neutral oil
• 3 large egg yolks
• 1 tablespoon lemon juice
• ½ cup cold butter, sliced roughly