For the poussins, preheat the oven to 400 degrees F (200 degrees C).
Place the poussins in a roasting tin. Pour the oil slowly over the top of the top of the poussins. Rub the oil into the poussins so that they are well coated.
Place the salt, sugar, cinnamon and paprika
in a small clean bowl and mix well. Sprinkle the spice mixture over the poussins. Slice the lemon into quarters and then slice each quarter into 4 so you have 16 small pieces. Place the pieces around and in between the poussins.
Separate the garlic bulb into cloves and place the pieces around and in between the poussins. Transfer the poussins to the oven and cook for 1 hour to 1 hour 15 minutes, or until completely cooked through. Remove the poussins from the oven and then let them rest for 10 minutes in their tin.