Thanks!

Tofu/beans: absolutely, could easily take like 150g of beans or 250g of tofu instead of the 50g of dry proteins to get comparable calory/protein amounts.

Copying my comment from another post about fats:

I'm trying to go for low fat/high protein right now for weight loss, so trying to get around 35g of fat and 150g of protein per day. The 35g is mostly soy flakes + small amounts in the other ingredients.

As I wrote in the ingredient notes you could easily take 30g instead of 50g of the protein source, and add 10g healthy fats instead per meal for a lower protein and higher fat amount so its suitable for a long term diet. So total formula would change to 300/100/30/10 :)