This place makes a wide variety of dishes that are popular in Mumbai, so no particular regional focus.
I went yesterday for lunch and before ordering talked for a while with the owner about how I like very spicy food but not when they just throw in too many of the wrong chiles and make the dish bitter and unbalanced. He recommended I order one of the kolhapuri dishes, which are the spiciest on the menu if you don’t order extra-spicy. He said a proper kolhapuri has a mix of 20 spices including an edible fungus he had his brother bring him from home. I got the mutton one, the sauce was delicious and complex, clearly a lot going on but hard to pick out any one element.
$10 as a lunch special came with bread, rice, delicious dal, and a dessert I guess was kheer, a soupy rice pudding, usually I find Indian desserts too sweet but this was lovely.