Preheat your oven to 275°F (135°C).
Spread makhana, peanuts, almonds, and cashews evenly on a baking tray.
Bake for about 25 minutes or until everything is well-roasted.
Meanwhile, heat oil in a pan, add chopped green chilies, and cook. Then add curry leaves and sauté until fragrant. Turn off the heat.
Once the nuts are roasted, let them cool for a few minutes.
Pour the spiced oil over the nuts.
Add black pepper powder, salt, and amchoor powder.
Toss everything well using a spatula or your hands.
Store in an airtight container.