boneless, skinless chicken breast halves (about 1 lbs) • cooked spagetti (follow package directions) • onion, diced • celery stalk, finely chopped • Velveeta cheese block (or 3 cans cream of chicken soup) • shredded cheddar ( 2-3 cups) • Rotel (undrained) • jar diced pimentos, drained • butter • * Optional ingredients: mushrooms, green peas, asparagus, water chestnuts, etc.