I think there may be a more official way to do it with slicing them open with a paring knife, but there is something so playful about opening them this way.

Source: https://smdp.com/2023/05/20/fava-beans-and-greens-a-food-that-spans-cuisines-cultures-and-time/

The 3.5-inch paring knife is great for delicate or precise cutting.

Source: https://mashable.com/deals/aug-31-seido-japanese-knife-set

Using a paring knife, score the cut side diagonally both ways to create a criss-cross pattern.

Source: https://www.bostonherald.com/2023/07/19/pan-roasted-zucchini-mediterranean-style/