Stuffed Bulgur Balls

Name: Stuffed Bulgur Balls
Cuisine: European, Eastern European
Ingredients: For the Dough; 2 cups fine bulgur wheat; 1 cup semolina; 1/2 cup all-purpose flour; 1 tsp salt; 1 tsp ground cumin; 1 tsp ground paprika; 1 large egg; 1 cup warm water (or as needed); For the Filling; 250g ground beef or lamb; 1 large onion, finely chopped; 1/2 cup walnuts, finely chopped (optional); 1/4 cup fresh parsley, chopped; 1 tsp ground allspice; 1/2 tsp black pepper; Salt to taste; 2 tbsp olive oil