Frugal

Probably should also be noted that you're almost certainly eating more than plenty protein, no matter what you do.
As in, for medical reasons, when people have a dodgy liver, it's helpful to reduce protein intake to what they actually need, but with how much protein our usual diet contains, it's really difficult to get there.

Interesting podcast/video on the topic: https://zoe.com/learn/podcast-should-i-eat-more-protein