Hash Brown Cake with Dill Sour Cream

Name: Hash Brown Cake with Dill Sour Cream
Ingredients: 1 cup sour cream; 2 tablespoons chopped fresh dill; Kosher salt and ground black pepper; 2 tablespoons unsalted butter; 1 tablespoon olive oil; 4 cups frozen cooked shredded potatoes, thawed; 2 tablespoons all-purpose flour; 2 teaspoons sweet paprika; 1 teaspoon kosher salt; 1 teaspoon ground black pepper; Pinch cayenne pepper; 2 large eggs, lightly beaten; 2 cloves garlic, smashed and chopped small; 1/2 yellow onion, grated; Fresh dill sprigs, for garnish