Cottage Cheese and Noodles

Bahan-bahan (4 porsi)

• ¼ cup salted butter
• 1 small yellow onion (diced)
• 8 ounces wide egg noodles
• 8 ounces cottage cheese
• ¼ teaspoon salt (or to taste)
• ¼ teaspoon black pepper
• sour cream (for serving, optional)