I'm not overweight, and get a lot of exercise, including weight
training.  I've found that replacing what used to be staple foods,
such as tortilla chips, graham crackers and ice cream, with
low-carb stuff, has caused me to lose weight that I didn't want to
lose.  And some of the replacements, like cheese, have too much sat
fat.

So I need to find something to eat that's:

Cheap
Low-carb
No trans-fat
Low-sat-fat
High-mono-fat and/or protein
Tastes at least ok
High in calories

I thought I had found it - peanuts.  But then I read that peanuts
are "atherogenic" despite having monounsaturated fat, for reasons
nobody is sure about.  Actually, I'm not sure this has really been
confirmed in humans.

Of course, I could just go in and mix up some tofu and olive oil,
but remember I said "tastes at least ok".

I'm already eating tree nuts, including almonds and walnuts, and
besides, they aren't cheap.

I understand that this is not a typical problem, but just wondered
if anyone had a suggestion for what might work.