Roughly chopping large batches of hard nuts For my breakfast oatmeal, I use a variety of nuts. I tend to make large batches beforehand. My biggest issue with the way I do it now, is how to prepare large batches of hard nuts that I'd like to chop roughly.

I have tried several methods:


A blender, or food processor, which grinds the nuts into a paste
Smashing them (covered with a cloth or in a bag) with a rolling pin, which completely pulverizes some and tends to skip a bunch as well
Chopping them with a chef's knife


Chopping them with a knife gives the best results, but it's very laborious and I can only do a handful or two at a time.

I've been trying to search online for suitable methods, but they all seem to use nuts like pecans or walnuts, which really aren't an issue at all. My problems are with Brazil nuts, macadamia nut or even peanuts, for example.

Is there any other tool or technique I can use to get roughly chopped nuts (they don't need to be perfectly even) suitable for an oatmeal mix?
A chopping jar:



(photo from Etsy)

should be exactly what you need.

(You may also want to look at multi-blade mezzalunas, but they're really meant for mincing herbs.)