Brush each half of the onion with olive oil and bake in a 350°F onion until they start to soften.

Remove the onion and scoop out a hole in the center. Do not penetrate all the way through. Leave a base for the stuffing. Also, do not scoop too wide a hole or the onion will lose its structure.

Mix the breadcrumbs, cheese, parsley, salt and pepper. Chop the onion you scooped out and mix it with the bread crumbs.

Moisten the mixture with enough olive oil to hold it together.

Fill the onion halves and return them to the oven until the stuffing is brown, about 30 minutes.