- 1 lb (450 g) russet potatoes, peeled and grated - 1 small onion, peeled and grated (about 3 oz / 85 g) - 1 large egg - 3 tbsp (24 g) all-purpose flour - 1 tsp (6 g) salt - 1/4 tsp (0.5 g) ground black pepper - 1/4 cup (60 ml) vegetable oil for frying, plus extra as needed - 2 tbsp (30 ml) sour cream for serving - 2 tbsp (8 g) chopped fresh dill or chives for garnish
1. Place grated potatoes and onion in a clean kitchen towel or fine sieve and squeeze out as much liquid as possible; reserve the starchy liquid and let it settle briefly, then pour off excess water and stir a spoonful of the settled starch back into the potato mixture. 2. Transfer potatoes and onion to a bowl, add the egg, flour, salt, and pepper; mix until just combined. 3. Heat a large skillet over medium-high heat and add enough vegetable oil to coat the bottom (about 2 tbsp / 30 ml); reduce heat to medium. 4. Spoon about 2 tbsp of the potato mixture per pancake into the skillet and flatten gently with the back of the spoon into 3–4 inch rounds; fry 3–4 minutes per side, or until deep golden brown and crisp. 5. Transfer cooked deruny to a paper towel-lined plate to drain; keep warm in a low oven if making multiple batches and add more oil between batches if needed. 6. Serve hot topped with sour cream and chopped dill or chives.
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