Heat oil in deep wok fry potatoes and transfer it in absorbing paper.
Fry capsicum till it get soft. Transfer it to a plate.
Fry mushrooms in heated oil when it done. Transfer it to a plate.
Leave 2 tablespoons oil in wok and splutter cumin seeds
Add garlic n cook till it brown.
Add onion, green chilies n cook till onion get transparent or pink in color.
Add salt, red chili powder, coriander powder, garam masala powder and turmeric powder. Mix it n add tomatoes cook till oil starts floating on all over masala.
Add palak mix, cover the lid and cook it on high flame till it remain half.
Add fried (capsicum, mushrooms and potatoes) and salt, mix it well gently n cook till sabzi get dry.
Palak mushrooms shimla aloo ki sabzi is ready to serve.
Serve this sabzi hot with chapati.
Notes
This sabzi is dry for gravy u can add 1/2 cup curd and 1/2 cup fresh cream.