Choose your substitute based on cooking method: cabbage or broccoli for roasting, kale or bok choy for sauté, radicchio for raw dishes.
Prep the substitute by chopping, slicing, or shaving as noted for best texture and cooking time.
Use a 1:1 volume ratio to replace Brussels sprouts in your recipe.
Adjust cooking times as needed; kale and bok choy require shorter cook times compared to cabbage and broccoli.
Check final dish for flavor and texture, and add seasoning to compensate for milder bitterness if desired.