Pav Bhaji-Simple method yet tasty!

I am sure everyone knows how to make Pav Bhaji. My method is going to be the simplest of all.
I don't make it often as pav buns are very high in calories!(about 100 calories per bun) I was in no mood to chop the veggies today and hence ended up making a very quick bhaji for dinner.
I had been to a friend's place during Navaratri and she prepared the gravy without onions and garlic. It was mild and very tasty. So here is no onion, no garlic Bhaji coming from my kitchen!

Small potatoes(peel the skin before pressure cooking)-3
Beans chopped into big pieces-1/2 cup
Carrot chopped into big pieces-1/4 cup

Other ingredients:
Oil-1 tbsp
Jeera-1 tsp
Salt
Turmeric powder-1/4 tsp
Red chilli powder-1/4 tsp
Pav Bhaji masala-2 tsp(or as per taste)
Coriander leaves- to garnish
Lemon juice from 1 small lemon
Pav buns(sweet dinner rolls)
Butter-to toast the buns

Method:
Pressure cook beans, carrot and potatoes together for 3-4 whistles.
Mash the potatoes and grind beans and carrot to a paste.
Heat oil in a pan, allow jeera to crackle, add the mashed veggies. Add some water and bring it to gravy consistency. Add salt, turmeric powder, chilli powder, pav bhaji masala and bring it to a boil. Switch off the gas. Garnish with coriander leaves. Squeeze lime and add tiny bits of butter.

Toast pav buns lightly with some butter and serve with bhaji.

If you are using onion, fry it in oil till golden brown along with 1 tsp ginger garlic paste.
Add 1 chopped tomato and a handful of chopped capsicum and fry till tomato turns soft.
Then add the boiled veggies and follow rest of the steps as given above.
Before serving, add finely chopped raw onions on bhaji.
Serve with pav buns and a wedge of lime.