Spicy mashed potatoes pinwheel

Ingredients

• 2 large boiled potatoes
• 1/2 tsp red pepper powder
• 1/2 tsp coriander powder
• 1/4 tsp ginger powder
• 1 tbsp chopped coriander
• 1/2 tsp cumin seeds
• 1/2 tsp black cumin seeds.
• 1/2 cup shredded mozzarella cheese
• 1 puff pastry sheet or pizza dough
• 1/2 egg/few drops of milk