Match your method first: roast/air-fry for similar caramelization, sauté for tender-crisp, or raw/shaved for crunch.
Use the listed substitute ratio (1:1) as your base, then scale down cooking time for smaller pieces (florets) or up for thicker slices.
If your substitute releases extra moisture (zucchini/cabbage), salt lightly and pat dry before high-heat cooking.
Taste at the final minute and finish with the same seasoning you’d use for Brussels sprouts (salt, pepper, garlic, lemon, or vinegar).
If the texture feels off, adjust the cut size for the next batch rather than changing the entire dish.