As Knotted said, tempeh, tofu, quinoa and rice & beans. The Horn of the Moon cookbooks are also very good. Sometimes I think they're better, at least for soups.

But, at the end of last summer we went through a similar situation. Our exercise had increased and we were missing proteins. We started throwing TVP into our plain red tomato sauces and including more tempeh and flavored tofus in what used to be just vegetable stir fries. Also, I try to grab some pistachios or cashews when I feel like chips (although walnuts would be better for you). When we get tired of bean soups, my DH makes a kick-butt tomato-peanut soup (sounds revolting, I know, but it tastes great).

Sorry, no hope on the cottage cheese....when I'm eating out at a salad bar, I'll often put cottage cheese on my salad, but usually only after a ride when I need that extra protein.