Take a pressure cooker and boil the vegetables (cauliflower, cabbage, beans).
Add salt, turmeric powder and ½ cup of water with vegetables and cook on medium heat.
Pressure cooks vegetables in 10 mins or in 3 whistles.
When all the steam gets released opens the pressure cooker and press with back of the spoon till all the vegetables are completely mashed. Don’t make it puree mashed it lightly.
Grind onion, garlic, ginger, and green chily to make a thick and fine paste.
Heat oil in a pan when oil becomes hot adds fenugreek seed.
When seed change its colour add onion paste and sauté on medium heat till the raw smell of ginger garlic paste disappears and oil separates from masala.
Grind tomato and make puree.
Add tomato puree with onion paste and sauté for 2 mins.
Add capsicum and peas and cook till the peas gets tender.
Combine the mashed vegetables, boiled and mashed potato with the masala.
Add salt,(I have already added salt in vegetables so adjust the salt accordingly) red chily powder, pav bhaji masala, lemon juice and mix it well.
Add some water. Keep on stirring and let the vegetable simmer for 5 minutes.
If the vegetable becomes too dry and then add some more water.
Garnish with coriander leaves, topped with butter and serve hot with butter Pav and chopped onion.
How to make pav:
Slice the Pav horizontally into two.
Apply butter on both the sides of pav.
Heat pan and fry pav on medium heat by pressing from both the sides. Fry till it becomes crisp and light brown.