Prepare the Green Paste: In a mixer jar, add the fresh green peas, green chillies, garlic cloves, ginger, coriander leaves, and curry leaves. Pulse them coarsely. Do not make a fine paste; a coarse texture is best for this recipe.
Make the Dough: Transfer the crushed mixture into a large bowl. Add the gram flour (besan), rice flour, sesame seeds, cumin-coriander powder, turmeric, hing, salt, and lemon juice. Crush the carom seeds (ajwain) between your palms and add them in.
Mix Well: Mix everything thoroughly by hand. Do not add water, as the moisture from the fresh peas is enough to bind the dough. If the mixture feels too loose, you can add a little more gram flour.
Shape the Rolls: Divide the dough into two parts. Grease your hands with a little oil and shape each part into a cylindrical log.
Steam the Vadis: Grease a steamer plate or sieve with oil. Place the logs on the plate. Steam them in a steamer or a cooker (without the whistle) for 10 to 15 minutes on medium heat.
Cool and Cut: Once steamed, turn off the flame and let the logs cool down completely. This is crucial for clean cuts. Once cool, cut them into medium-thick slices (discs).
Fry to Perfection: Heat oil in a pan. Deep fry the slices on medium heat until they turn golden brown and crispy on both sides. You can also shallow fry them for a healthier option.
Serve Hot: Drain on a tissue paper and serve your hot Vatana Vadi immediately.