Minimizing oven mess when roasting veggies with olive oil

For both chicken & vegetables, I roast them in a deepish dish.
Use a moderate amount of oil (enough for flavor and mouthfeel, but not swimming in it).
To with a piece of foil for most of the time - not tucked in, open at the sides - which prevents most splattering.
Then, remove the foil near the end for crisping of edges.