Heat a pan over medium heat. Add butter and ground beef, cook until browned. Add onion and sauté 2-3 minutes. Add bell peppers, corn, salt, pepper, and paprika. Cook until soft and fragrant. Stir in parsley if using. Let the filling cool slightly.
Lightly sprinkle wrap with water so it becomes flexible. Cut each sheet in half.
Place meat filling on one side, add shredded cheese on top. Fold into triangles.
Arrange triangles on a lined baking tray. Sprinkle a little extra cheese on top. Bake at 350°F (180°C) for 20-25 minutes, until deeply golden and crispy.
Let rest 5 minutes and then enjoy.
