Preheat oven to 400 degrees.
Grab two circular pastry cutters - one a little bit smaller than the other. Using the large one, cut out 9 circles in one of the puff pastry sheets. Then, using the same large pastry cutter, cut out nine large circles in the other pastry sheet as well. Then, using the smaller one, cut circles into the circles already cut out. Using a brush, brush some egg onto the bottom of the circle with a "hole" and place it on the larger circle. Repeat till you have nine circles on top of circles. Brush the tops with egg wash and bake at 400 degrees for 15 to 18 minutes. As these bake, they should rise up, forming baskets.
As the baskets are baking, chop the onion and add to a pan with olive oil over medium heat. Then after 5-7 minutes, add in mustard seeds, chopped ginger and garlic as well as potatoes and lower heat to a low setting.
Cover potatoes and let cook about 10 minutes or till potato cubes are tender.
Uncover and add in the peas, turmeric, smoked paprika, coriander, salt, pepper and saute a couple more minutes.
Add the spiced potato filling into the puff pastry baskets and garnish with parsley if desired and enjoy.