Place the cubes of paneer in a bowl, and add turmeric and salt, then mix well. 

Heat some oil in a large skillet and add the paneer. Cook, stirring frequently, until a few of the sides of each cube have turned golden brown

Remove the paneer with a slotted spoon - keeping the oil in the pan - and transfer the cubes to a bowl. Set aside. 

Add more oil if necessary, then prepare the spice blend by adding garlic paste, onion powder, ground cumin, and garam masala. Cook for a few minutes, stirring frequently, then add some water to make a loose paste.

Add two boxes of chopped frozen spinach, and reduce the heat to low. Let the spinach defrost, stirring as it thaws. When the spinach has fully defrosted, turn up the heat and boil off any excess liquid. 

Taste for seasoning and add salt and pepper. You'll probably need a lot of salt!

Return the fried paneer to the pan, heat through, and serve.