I'm attempting palak paneer tonight. I found this very simple video about making the paneer. I've made mozzarella before, which you have to have rennet for, so I'm not really daunted about this. I'm pressing my first batch right now. This video does not have any amounts in it, though. I thought maybe my large skillet (like the one pictured here) would hold a gallon of milk, but it's more like a little over 1/2 gallon. I used vinegar and put in only maybe 1 1/2 teaspoons. He does not say how you know if you are using the right amount, just that you want to avoid using too much! So I poured in about a teaspoon and let it curdle. Then I added a little more to see if it would curdle more.
I'll get back to you about the palak (spinach gravy), and how it all came out.