In the same Dutch oven over medium heat, soften the onion for 5 minutes or until translucent. Add the garlic and cook 1 minute. Deglaze with the wine and let reduce by half. Add the squash, tomatoes, broth, lentils and the reserved chicken. Bring to a boil. Cover and transfer to the oven. Cook for 1 hour or until the meat comes away from the bones.