Add your pan to your stovetop and turn to medium heat. Add your oil.
Chop your onions and add them to the pan. Allow those to cook for 4-6 minutes.
Add your ground beef to the pan. Break it up into smaller pieces.
Add your spices to the pan. Mix this and allow it to cook on the pan for another 10-12 minutes.
Add your buckwheat and tomato sauce to the pan with the meat and mix. Allow all of this to cook for another 5 minutes. Then remove from heat.
Cut out the core and remove the seeds to your poblano peppers.
Preheat your oven to 400 degrees Fahrenheit.
Fill your peppers with your meat and buckwheat mixture. Then place your peppers into the baking dish.
Add the chicken stock to the bottom of the dish. Cover it with foil and bake it for 50 minutes.
Remove the foil from the baking dish. Top the peppers with cheese and bake for an additional 10 minutes. Enjoy!
