One-pot Greek Oven–Roasted Chicken and Potatoes

About 120ml | 1/2 cup chicken stock or white wine

floury potatoes (such as Maris piper, peeled and chopped into large cubes)

large chicken (preferably free-range (about 1.5kg /3.3lbs))

small red onion (peeled and halved)

large garlic cloves (peeled and crushed)

olive oil (or more, as needed)

dried oregano (or more, as needed)

bay leaves

lemon

salt and freshly ground pepper