| Preheat oven to 350°F |
| Grease a 9x13-in baking dish |
| Bring a large pot of salted water to a boil |
| 1 lb spaghetti | boil until al dente, drain | toss to coat | layer twice: pasta, cottage cheese, sauce, mozzarella | cover with foil, bake 350°F 40 min | uncover, bake 20 to 25 min until browned |
| 2 large eggs | whisk |
| 1/3 cup grated Parmesan cheese |
| 5 Tbsp butter, melted |
| 1 lb ground beef | brown to 160°F, drain fat | stir in |
| 1 medium onion, chopped |
| 1 jar (32 oz) marinara or spaghetti sauce |
| 1/2 tsp seasoned salt |
| 2 cups small-curd cottage cheese |
| 4 cups shredded mozzarella cheese |