Pat the hens dry with paper towels and generously season with the dry rub both inside and out.
Preheat your oven to 425 °F.
In a small roasting pan add the quartered onions, garlic cloves, and half the lemon wedges. Stuff the remaining lemons into the cavities and then place the hens in the roasting pan over the onions and drizzle the olive oil over the hens.
Transfer the roasting pan to the preheated oven and bake for 50 to 60 minutes or until an instant-read thermometer inserted into the thickest part of the breast registers at 165 °F.
Remove the hens from the oven and let them rest for 20 minutes and serve.
Notes
I love to present these at a holiday meal. You can also easily cut them in half to plate them for everyone.