Serbian Potato Musaka

Name: Serbian Potato Musaka
Prep time: 30 min
Cook time: 1 h 15 min
Total time: 1 h 45 min
Cuisine: European, Eastern European
Ingredients: 2 tablespoons (30 milliliters) olive oil (plus more for greasing the pan); 1 medium onion (chopped); 1 pound (454 grams) ground beef (or other ground meat); Salt and freshly ground black pepper (to taste); 3 pounds (1.4 kilograms) russet potatoes; 4 large eggs; 1 cup (240 grams) yogurt or sour cream; 1 1/2 cups (355 milliliters) milk; 1 teaspoon Salt; 1/2 teaspoon freshly ground black pepper; Parsley (for garnish, optional)