BTW, another way I've boosted my protein intake is with higher protein versions of stuff I already ate.

Better Oats Steel Cut High Protein has 10 g protein per serving. Tastes great too. Comes premixed with brown sugar and cinnamon, and the single serving packet itself is the measuring container for water. Two minutes in the microwave. Sometimes I'll add a couple of tablespoons of plain oats and a little more water.

And Nature's Own high protein bread has 8 g per slice. Fortunately the dollar store down the street gets it several times a week so at a buck a loaf it's incredibly cheap protein and bread in one. Can't say it tastes great but it's adequate for sandwiches. Better toasted. It's really more the unsatisfactory texture than the flavor. I like fresh homemade bread so it's hard to compare any whole grain packaged bread. Even homemade or bakery fresh bread loses that texture after a couple of days.

And I'm trying to eat more eggs. Very cheap protein, even during those occasional price spikes when it goes from around a dollar a dozen to more than $2 a dozen. I have a microwave poacher that makes a single egg roughly the size and shape of a burger so it fits nicely on bread or hamburger buns. Quick and easy.