Because zacusca is prepared not quite simply and banally, I would recommend you do it in 2 days - that is in 2 steps.
On the first day prepare the vegetables (bake, clean, wash) and on the second day make zacusca.
First bake the eggplant, peppers and donuts (optionally you can only bake eggplant, put the other 2 raw, but I recommend you bake them anyway :)