Preheat the oven to 180°C / 360°F.
Cook pasta as per packet directions, then drain.
Heat the olive oil in a large frying pan over a medium high heat. Brown the chicken, bacon and onion for around five minutes or until the chicken is almost cooked. Add the broccolini and/or asparagus and cook for a further minute.
Reduce heat to low-medium and pour in the cream of celery soup, water and thickened cream / heavy cream. Stir until evenly mixed, allowing the sauce to warm through and thicken (about 5-10 minutes)
Reduce heat to low-medium and pour in the cream of celery soup, water and thickened cream / heavy cream. Stir until evenly mixed, allowing the sauce to warm through and thicken (about 5-10 minutes)
Bake for around 40 minutes or until the top is golden brown