Can I sub frozen spinach for fresh in Saag sauce

I want to make saag paneer. I can use fresh spinach, but it is much easier and cheaper to buy frozen spinach in bulk. How can I make the substitution?

I think it would work. I was curious, so I googled a bit and came up with the equivalence of 1 pound fresh spinach=1 cup cooked=5 oz. frozen. I would think that you would want to defrost it and sqeeze out the water before adding it in, though.