Prepare the Vegetable Filling:
Heat oil in a skillet over medium heat.
Sauté red onion until translucent. Add mushrooms and cook until tender.
Stir in tomato paste, salt, and black pepper. Cook for another 2 minutes and set aside.
Prepare the Meat Filling:
In the same skillet, heat oil and add ground meat.
Season with paprika, dried garlic, salt, and black pepper. Cook until browned and fully cooked. Remove from heat and let cool.
Assemble the Puff Pastry:
Preheat oven to 180°C (350°F).
Roll out the puff pastry on a floured surface.
Spread mayonnaise evenly over the surface.
Layer with ham, cheese, sautéed mushrooms, and cooked meat.
Seal and Top the Pastry:
Roll the pastry into a log or fold it into a rectangular pocket. Seal the edges tightly.
Brush the top with beaten egg and sprinkle with sesame seeds, poppy seeds, chives, and parsley.
Bake:
Transfer to a baking tray lined with parchment paper.
Bake in the preheated oven for 30 minutes, or until golden and puffed.
Serve:
Let the pastry cool slightly before slicing. Serve warm.
Serving Suggestions

Pair with a fresh green salad or a bowl of soup.
Serve as a hearty snack or a centerpiece at gatherings.
Cooking Tips

Use chilled puff pastry to make it easier to handle.
Customize the filling with your favorite vegetables, cheeses, or seasonings.
Brush with egg wash for a shiny and golden crust.
Nutritional Benefits

Cheese: Provides calcium and protein.
Mushrooms: Rich in vitamins and antioxidants.
Ground Meat: A good source of protein and iron.
Dietary Information

Contains Dairy, Gluten, and Eggs.
Nutritional Facts (Per Serving, Approx.):

Calories: 300
Protein: 12g
Carbohydrates: 20g
Fat: 20g
Fiber: 2g
Sodium: 450mg