Tilapia is not an item you will be happy with if you cook it ahead of time. Fish, in fact, is just about ALL "a la minute" food. You can, however, prep it ahead and have it ready on a sheet pan to go into the oven just before service.
Have the oven heated to the correct temp ahead of time, and when you come into the kitchen to fix the plates, slide that pan right into the oven. I have never known tilapia to take more than 10 to 12 minutes to cook, even nut-crusted.
Wine is the food that completes the meal.