Place a steamer insert into a saucepan and fill with water to just below the bottom of the steamer; bring to a boil. Add the rutabaga and steam until just tender, about 10 minutes.
Bring 2 cups water and 1 tablespoon vegetable oil to a boil in a saucepan. Remove from the heat and stir in the couscous. Cover and let stand until the water is absorbed, about 14 minutes; fluff with a fork.
Whisk nutritional yeast, 1/4 cup vegetable oil, apple cider vinegar, honey, Italian seasoning, oregano, dill, black pepper, and cayenne pepper in a large bowl.
Stir couscous and rutabaga into the nutritional yeast dressing. Season with salt.
