Heat the oil in a 12-inch skillet over medium-high heat. Add the chicken and cook for 10 minutes or until well browned on both sides. Remove the chicken from the skillet.
Reduce the heat to medium. Add the garlic to the skillet and cook and stir for 1 minute. Stir in the vinegar and cook, scraping up the browned bits from the bottom of the pan.
Stir the soup and beans in the skillet and heat to a boil. Stir in the spinach. Return the chicken to the skillet. Reduce the heat to medium. Cover and cook until the chicken is cooked through and the spinach is wilted.
Ingredient Note: We develop our recipes using a 4-to 5-ounce skinless, boneless chicken breast half per serving. However, there are a range of sizes available in-store, from the butcher counter to the meat case and the freezer section. Use whichever you prefer- just follow the recipe as written above for the best result. If you're using larger chicken breasts they may require a little longer cooking time.