Sour Cream Pasta Bake

Ingredients

• 1 pound ground beef
• 1 (15-ounce) can tomato sauce
• 1/2 teaspoon salt, plus more, to taste
• 1/2 teaspoon ground black pepper, plus more, to taste
• 1/2 teaspoon garlic powder, plus more, to taste
• 8 ounces egg noodles
• 1/2 cup sour cream
• 1 cup small curd cottage cheese
• 1 1/2 cups cheese, shredded, divided into thirds
• 1/4 cup green onions, diced, plus more, to taste, for serving