Blend the coriander, green garlic, ginger, garlic, green chillies and optional coconut into a green masala paste.
Heat the tempering oil in a large, deep pan.
Add cumin, carom, sesame and mustard seeds, and let them splutter.
Add asafoetida (heeng) and the prepared green masala paste. Sauté briefly until fragrant.
Add the prepared air-fried vegetables and steamed beans. Cook together for 5–7 minutes.
Add the dry spices and tomato puree, and cook for another 5–7 minutes.
Add the cooked muthia and green peas to the vegetables and gravy. Pour in 2–3 cups of water as needed, mix gently, cover and cook until the vegetables are tender and the gravy thickens to your preferred consistency.
Check that all vegetables are tender. Adjust the salt to taste and add more water if needed. Turn off the heat and stir in the lemon juice.
Serve with poori/roti