Abstract: A cooking vessel has a segment of a perfect hollow sphere as food-holding chamber integrated with a cylindrical shaped housing with breathing vents along its perimeter. This chamber is configured allowing accumulation of food on the food-holding chamber in proportion to the amount of heat being received by that particular spot. The cylindrical housing incorporates at its base a flat ring to stabilize the vessel's position when it rests on a flat surface. A removable cover on the chamber defines its cooking space. To accommodate various amounts of food to be cooked in the same chamber, the vessel has different-sized removable covers each with a definite diameter allowing most common household amounts. This way, the vessel adjusts steam and flue gas trapping space that is responsive to different cooking amounts and allows the cook some control over pressure in the chamber.