Keeps 3 days refrigerated, though the basil darkens within hours — add it fresh on day two. Let it sit out 20 minutes before serving; fridge-cold mutes everything.
Yes, but hold back some dressing and the basil. Pasta absorbs dressing overnight and looks dry — refresh with oil and vinegar before serving.
Under-salted pasta water and under-seasoning at the end. Salt the water like the sea, then taste again after chilling.
Room temperature. Straight from the fridge the olive oil is thick and the tomatoes taste of nothing.