Cheese Grillers Product Information 330g.Ready to eat.Keep refrigerated below 5°C.Consume within 2 days of opening. Cooking Instructions Stove top: Remove viennas from packaging and pre-heat in boiling water for 2-3 minutes.Microwave: Remove viennas from packaging and microwave on high in a dish with a little water for 2-3 minutes. Cooking guidelines may vary with appliances.