Shredded Root Vegetable Pancakes

Name: Shredded Root Vegetable Pancakes
Ingredients: 2 cups of shredded rutabaga, parsnips, or sweet potato (from about 2 medium vegetables), shredded on the medium holes of a box grater; 1 medium yellow onion, grated on the medium holes of a box grater; 3 large egg whites, beaten; 1/4 cup all-purpose flour, plus more if needed so mixture just holds together; 1 teaspoon kosher salt; Freshly cracked black pepper; 1/2 cup coconut or grapeseed oil; Flaky sea salt; 1/4 cup sour cream or crème fraîche; 2 scallions, finely chopped