'Roughly chopped nuts' means the nuts should be cut into uneven pieces, generally larger than finely chopped nuts, without precise uniformity. The goal is texture, not perfect aesthetics.
When a recipe instructs you to 'roughly chop' nuts, it's asking for a relaxed approach to chopping. You don't need to aim for perfectly uniform pieces. Instead, focus on breaking the nuts down into smaller, manageable sizes that will add texture and visual interest to your dish. Think of it as a rustic chop – some pieces might be larger than others, and that's perfectly fine. The size of the pieces will depend on the recipe, but generally, aim for pieces that are about 1/4 to 1/2 inch in size. Use a chef's knife or a nut chopper for this task. Simply gather a handful of nuts and rock the knife back and forth over them until they are chopped to your desired coarseness. Don't overthink it! The beauty of 'roughly chopped' is its forgiving nature.
To prevent nuts from flying all over your kitchen while chopping, try placing them in a resealable bag or under a clean kitchen towel before chopping. This will help contain the pieces and make cleanup much easier.