A question about a recipe: Saffron-scented Vegetable Couscous with North African-spiced Halibut

I have a question about step 3 on the recipe "Saffron-scented Vegetable Couscous with North African-spiced Halibut" from deensiebat. It says:

"When the fish has marinated, transfer it into a baking dish. Scrape out any remaining spice paste from the marinade dish, and spread thickly on top of the fillets. Bake until the fish is done and flakes easily, 25-30 minutes."