Thanks for the responses.
I found several eggwhite protein powder with almost no carbs. And this study suggests
Metabolic response to cottage cheese or egg white protein, with or without glucose, in type II diabetic subjects
M C Gannon et al. Metabolism. 1992 Oct.
the insulin response to eggwhite protein powder is lesser than cottage cheese.
So when I need extra protein, I'll stick to collagen and eggwhite protein powder.