How to replace chicken with tofu in a curry
If you're going to be adding a curry sauce, there's no need to just throw on some extra herbs and spices.

Use an extra-firm tofu, and make sure you drain/press out any extra water before frying. Wrap your tofu block in paper/kitchen towels, place a plate with some additional weight (not too much, a few pounds will do), and let it sit up to an hour before slicing and frying.