I eat walnuts, pecans, and almonds. I go with raw unsalted. They don’t seem to trigger the “eating one makes you want more” sensors.
Being aware of the tendency to eat all of them that are in reach, I weigh and portion them out in small plastic snack bags when I take them to work, or put them in a small bowl if I am going to eat them at home. By measuring out exactly one ounce and then dumping them into my hand, I have calibrated my “handful of nuts” to where it’s about 1 oz. That’s about 180 calories, 4g total carbs, 2g net carbs. And it’s not a lot of nuts.
Great way to up your fat intake, though. 18g fat to 4g protein in that 1oz serving. Just have to watch the quantity.