These can be prepped up to 8 hours in advance. I’ve never left them overnight so I don’t know how that turns out. I like to slice them in the morning and drizzle olive oil over them and add a little bit of parsley and paprika. Then I let them sit in the fridge until I am ready to bake them. When you are ready to bake them, place on the parchment lined cookie sheets and season when you are ready to bake them.