Preheat your oven to 350°F / 177°C.
Pat dry the chicken’s outside (and inside if you prefer)
Take the knife and the lemon and poke many small slits in the lemon’s skin. Then shove the lemon into the cavity of the chicken.
Truss the chicken with the butcher’s twine.
Use the oil to coat the outside of the chicken.
Take your 5-quart Dutch oven and place a bit of grass, straw, or hay into the bottom of the Dutch oven.
If you are using a skewer thermometer, place the probe into the chicken breast at the thickest part and not all the way to the bone.
Make sure there are no tips or ends of the grass, hay, or straw sticking out above or over the edge of the cast iron Dutch oven’s rim or brim. If so, snip them off.
Place the Dutch oven with the chicken and the grass into the preheated oven.
When the thermometer reads 165°F / 74°C, remove the chicken from the oven and check the chicken at a few other spots to make sure it’s done.