Question on preping potatoes the day before

I have a valentine's party for my kids tmr and I wanted to do something that was not sweet. I found a recipe for some heart shaped roasted potatoes. I found that I can parboil the day before, but I am wondering if I should leave them in water overnight or if I can put them in olive oil and herbs. I will bake them in the morning before we go so they will be warm and I am hoping crispy. I am just not sure what I can do all in advance. Thanks

bon appetit