Preheat oven to 400 degrees.
Place the sweet potato on a cookie sheet and bake in the oven for 45-50 minutes or until tender.
Remove from oven.
Let cool for 5 minutes.
Cut sweet potato in half and scoop out most of the flesh.
Place the halves back on the cookie sheet.
Place flesh in a medium bowl and mash with a fork.
Heat a frying pan to medium-high heat.
Add the ground chicken and olive oil.
Add the dried spices, chopped onion and optional sriracha.
Cook the chicken mixture, breaking up the large clumps with a wooden spoon for 10 minutes.
Add the chopped spinach and the mashed sweet potato flesh to the cooked chicken and stir together.
Add feta cheese leaving a bit of feta aside to use at the end.
Divide the stuffing mixture into the sweet potato halves.
Sprinkle feta over each one.
Return stuffed sweet potatoes to the oven and bake for 15 minutes.
Remove from the oven and serve.
Enjoy!