Prep the Greens: Wash the spring onions, mint, and coriander leaves thoroughly in clean water. Roughly chop the spring onions (both the green leaves and the white bulbs).
Add to the Blender: In a mixer grinder or blender jar, add the chopped spring onions, green chillies, garlic cloves, mint leaves, and coriander leaves (with stems).
Season It: Add the cumin seeds, salt to taste, coriander seeds (if using), and freshly squeezed lemon juice to the jar.
Blend: Grind the mixture into a smooth or slightly coarse paste, depending on the texture you prefer. Try not to add extra water, as the onions and lemon juice will provide enough moisture.
Final Touch: Once blended, you can mix in two pinches of sugar. This is completely optional, but it beautifully balances the spicy and sour flavours. Give it one quick mix, and your Spring Onion Chutney is ready!