01 - Whisk together flour, eggs, milk, melted butter, and salt in a bowl until smooth and lump-free. Let batter rest for 10 minutes.
02 - Heat a nonstick skillet over medium heat and brush lightly with butter or oil. Pour a small ladleful of batter, swirling to coat the pan thinly. Cook for 1–2 minutes until the edge lifts, then flip and cook 30 seconds on the other side. Repeat until you have 8 crepes, stacking with parchment in between.
03 - Heat oil in a large skillet over medium heat. Sauté onion until translucent, about 3–4 minutes. Add garlic and cook 1 minute.
04 - Stir in ground meat and cook, breaking up lumps, until browned. Sprinkle with paprika and mix well.
05 - Add tomato paste, salt, pepper, and broth. Simmer uncovered for 10–15 minutes, until most liquid evaporates. Stir in parsley. Strain the filling, reserving the pan juices for the sauce. Cool slightly.
06 - Preheat oven to 350°F (175°C). Place a crepe on a work surface, add 2–3 tablespoons of filling along the lower third, fold in the sides, and roll up. Repeat with remaining crepes and filling. Arrange filled crepes seam-side down in a lightly greased baking dish.
07 - Whisk flour into sour cream until smooth. Stir in reserved pan juices or broth. Pour sauce evenly over crepes.
08 - Bake uncovered for 15–20 minutes, until heated through and sauce is bubbling. Garnish with extra parsley if desired. Serve hot.