Press the SAUTÉ button on the Instant Pot. Heat 1 tablespoon oil and 1 tablespoon butter. Add the finely chopped onions and ginger-garlic paste, and sauté for 3-4 minutes, or until the onions turn soft and light golden.
Next, add the finely chopped tomatoes and spices like red chili powder, turmeric, salt, pav bhaji masala. Mix well and cook for 1-2 minutes till the tomatoes are soft.
Then add potatoes, cauliflower, green bell pepper, green peas, carrots, beetroot, and water. Mix well.
Close the Instant Pot with the pressure valve to Sealing. Cook on High Pressure for 6 minutes.Stovetop Pressure Cooker Method
Follow the same steps as the Instant Pot. Cover the cooker with a lid and cook for two whistles or about 12-15 minutes (if on a stovetop pot) on medium heat. All other steps remain the same. Once the pot beeps, wait for NATURAL PRESSURE RELEASE (NPR).Mash the bhaji with a potato masher or use an immersion blender and coarsely grind the ingredients. Turn on the SAUTE again and add the Kasuri methi (dried fenugreek leaves), optional but recommended, lemon juice, and salt if required. Let the bhaji boil for 2 minutes.
Next, add butter (optional but recommended) and garnish with coriander leaves
Slice each pav horizontally. Heat an iron skillet or tawa over medium heat and spread a little butter. Place the pav cut-side down and toast both sides until golden brown and lightly crisp.
Serve the toasted pav with the bhaji. Garnish the pav bhaji with a dollop of butter, finely chopped onions, fresh coriander leaves, and a squeeze of lime, if desired.