Heat oil in a pan on medium heat. Add cumin seeds and fennel seeds. Once the seeds start to sizzle, add ginger, green chili and hing. Cook for about 30 seconds.
Add the boiled & mashed potatoes, green peas, salt, coriander powder, garam masala, dry mango powder and red chili powder. Mix everything well together and let it cook for 1-2 minutes on low heat.
Remove pan from heat and let the filling cool down a bit.
Slice the jalapenos in half vertically to create 2 halves per jalapeno. Remove the seeds and the inside of the jalapeno. No need to remove the stem (leave it out when enjoying the poppers). Make sure to use gloves or wash hands right after handling the jalapenos.
Stuff each of the jalapenos with the samosa stuffing mixture. Press some grated cheese on top of the samosa filling.
Load the poppers into the air fryer. Spray the poppers with cooking oil (this is optional). Close the air fryer.
Cook the poppers on 370F for 7-8 minutes. Remove from the air fryer and let them cool a bit before serving.
Drizzle some tamarind and mint cilantro chutney before serving.