Cut your chicken breast in bite sized cubes and season it with salt, pepper, and garlic powder.
Wash, peel and cut your onions, celery, and carrots in small cubes.
Heat a large pot over medium-high heat and add the olive oil.
Add the chopped chicken and cook until it's browned on all sides. Remove the browned chicken to a plate and set aside.
Turn the heat down to medium and add the diced onion, carrots, celery, garlic, thyme, oregano, and onion powder to the pot. Sauté until the onions are translucent and soft.
Deglaze the pot with the white wine, making sure you scrape the pot very well.
Once the wine cooked off, add the flour and let it toast for a few moments.
Add the chicken stock, mixing gradually, then add the heavy cream and bring the mixture to a boil.
Add the corn and green beans and stir well. Let everything cook.