Add olive oil to pot and heat over medium to medium high heat.
In the meantime, salt and pepper both sides of your chicken and then set the pieces into the pot to brown, turn and brown the other side.
Throw onion, garlic and tomato paste into pot, season with salt and pepper. Stir it all together to incorporate tomato paste. Cook for a few minutes.
Add chicken broth and tomato sauce and throw in the piece of cinnamon stick. Stir, bring to a boil.
Once it boils, turn down heat to simmer and cover pot. Cook for 15 minutes.
Add green beans and potatoes, season again with salt and pepper, to taste, and bring to boil again, then lower heat and simmer, covered, for an additional 30 minutes.
Uncover, stir, taste one more time to see if you need any extra seasonings and cook, uncovered, on medium heat for 15 minutes.
Turn the heat off, let sit for 5 minutes before serving.
Goes well with crumbled feta on top and a chunk of crusty bread, if you have it.