1. Preheat oven to recommended temperature. (Never exceed 200°C).
2. Lightly oil and season food as required. Add 1 tablespoon of plain flour to bag and shake to distribute evenly. This reduces liquid splattering during cooking.
3. Place food evenly in bag and close end with a single key-lock tie. To secure tie, thread one end sideways through the opposite hole until at desired tightness, then turn to lock.
4. Pierce top of bag 4-6 times to vent and prevent the possibility of the bag bursting. Place in a deep baking dish ensuring bag does not hang over sides.
5. Place in the centre of a preheated oven. Allow enough room for bag to expand during cooking without touching heating elements, walls or racks. Do not exceed recommended temperature.
6. Use the chart shown as a guide for cooking times. When cooking is complete, remove dish from oven and rest for 10 minutes, then carefully cut open top of bag. Beware to avoid escaping steam. Lift food out from bag to serve. Drain juices and use to make gravy if desired.