Hardboiled egg and a stick of string cheese is my go-to near-zero-carb satiating snack, at least on work days.Carbs=sugar. Nuts are great if you can stick to the serving size, which isn't even one handful for me.
When I was still working I'd take two or three hard-boiled eggs and a leftover piece of meat from the night before, that would get me comfortably to dinner time. Anything that spiked blood sugar (fruit) just made me hungry in the afternoon. YMMV

just me but eggs unless fried, boached or scrambled hard do something to me that is unpleasant. Think it's a texture thing.
