Meanwhile, in a large skillet over medium heat, heat the olive oil until shimmering. Add the onion, and cook, stirring, until it starts to soften, 3 to 4 minutes. Add the celery and garlic and cook, stirring often, until they soften, 3 minutes. Add the mixture to the soup, deglazing the skillet with a little bit of the broth from the soup, then add the deglazed contents back to the soup pot. Add the salt and pepper, taste, and add more if needed. Pick out and discard the bay leaves.