Created by JostLori on June 27, 2016
Step 1: Preheat oven to 375 degrees. Butter a 13x9x2-inch baking dish.
Step 2: Cook the egg noodles in a large pot of boiling water according to package directions. Drain and rinse in cold water.
Step 3: In a large mixing bowl, gently whisk the 3 egg yolks. Slowly add the melted butter and salt, and whisk well to combine. Add the cooked noodles, stirring to coat.
Step 4: In a medium bowl, stir together the cottage cheese, sour cream, and sugar. Scrape into the bowl with the noodle mixture and give everything a good stir.
Step 5: In a clean, dry mixing bowl fitted with the whisk attachment, beat the egg whites with a pinch of cream of tartar until stiff peaks form. Fold gently into the noodles. Spread into the baking dish and smooth the top. Dust with the cinnamon.
Step 6: Bake in the center of the oven for 45 minutes. Serve warm, or refrigerate overnight (cool to room temp first), cut into squares, reheat, and serve.