Baked Chicken With Lemon and Herbs without drumsticks

2 tablespoons olive oil 3 chicken breast fillets , quartered 2 leeks , sliced 1 tablespoon lemon zest 2 cups arborio rice or 2 cups carnaroli rice 5 cups[...]

1 tablespoon butter 1/3 cup dry breadcrumbs 1 teaspoon dried basil 1/2 teaspoon dried rosemary 1 1/2 cups milk 1 lb boneless chicken breast 1 small onion ,[...]