Choose the substitute based on your cooking goal (mash/soup vs roast) and pick the closest texture listed in the table.
Use the ratio: substitute 1:1 when the veg is similar in density, or ¾:1 when it’s sweeter/softer than rutabaga.
Prep for the method: cube for roasting/soups, or boil until very tender for smooth mashes.
Adjust after cooking—add salt and butter/broth to deepen flavor, or a small pinch of sugar/acid to correct sharpness or sweetness.
Taste and fine-tune texture: thin soups with broth; mash with a splash more fat or liquid for the right thickness.