Braised Chicken with Figs without basil serrano breasts

1 pound tomatoes (3 to 4 medium), cut into wedges 1 large onion, cut into wedges, leaving root ends intact 1/2 cup drained brine-cured black olives, pitted if[...]

1 tablespoon olive oil 8 chicken thigh fillets 1 sprig rosemary , finely chopped, plus extra sprigs to serve 1 red onion , finely sliced 3 garlic cloves ,[...]