ground beef (or a combination of ground beef and ground turkey) • Olive oil, for sauteeing • large onion, diced • red bell pepper, diced • orange bell pepper, diced • celery, sliced • garlic, minced • carrots, peeled and cut into thick slices • golden and/or red potatoes, peeled and cut into the chunks • low sodium beef broth • cans diced tomatoes • tomato paste •