Spinach and Vidalia Onion Kugel — Jewish Food Society

Ingredients

• 1 stick (8 tablespoons) butter plus more for greasing, divided
• 1 large vidalia white onion, diced
• 2 teaspoons kosher salt, divided
• 1 8-ounce package medium egg noodles
• 1 10-ounce package frozen chopped spinach, defrosted
• 1 pint sour cream
• 3 eggs, beaten