In a bowl, combine ¼ cup of olive oil, paprika, date syrup, salt and black pepper.
Add the leg quarters, potatoes and sweet potatoes and coat well.
Preheat the oven to 355 degrees F. / 180 degrees C.
Place the onion rings on the bottom of a sheet pan, drizzle ¼ cup of olive oil and pour over the rice evenly.
Arrange the leg quarters on top of the rice, add the potatoes and sweet potatoes and pour the water in the spaces between the chicken and potatoes.
Cover with parchment paper, then aluminum foil and bake for an hour and 40 minutes.
Remove the parchment and foil and bake for another 20 minutes, until the chicken is browning.