Chicken with sprigs

4 ounces bacon , slices cut crosswise into 1/4-inch-wide strips 4 skin-on bone-in chicken thighs (about 1 1/4 pounds) 4 chicken drumsticks (about 1 pound)[...]

2 tablespoons extra virgin olive oil 1 tablespoon butter 1 onion , finely chopped 3 sprigs rosemary , 1 finely chopped, the other 2 cut in half 3 tablespoons[...]

1/4 cup flour 1 1/4 teaspoons kosher salt 3/4 teaspoon black pepper 1 chicken , cut into pieces (3-4 lbs.) 1/4 cup olive oil 1 medium yellow onion , roughly[...]