Qbag consists of an aluminium foil pouch with a clear window on top. During cooking, the food inside is visible, allowing you to easily monitor your dish.
The bag provides a cooking 'chamber' for food to cook in its own juices, and the window automatically vents to allow pressure and excess steam to escape safely.
The window may be peeled off during cooking for stirring or tasting, or removed altogether after cooking to create a serving vessel. If you prefer a steamed result, leave the window in place. If you prefer a grilled or roasted result, remove the window during cooking to allow food to brown and crisp up.