Abstract: Several embodiments include a cooking instrument. The cooking instrument can select a food cooking recipe and identify relative areas in a cooking chamber to place at least two portions of food. The relative areas would match the food cooking recipe. The cooking instrument can display information associated with an instruction to place the at least two portions of food over the relative areas. The cooking instrument can then determine a heating sequence in accordance with the food cooking recipe and control, based on the heating sequence, a heating system to directionally transfer heat under different heating characteristics respectively to the at least two portions of the food at the identified relative areas in the cooking chamber.

Abstract: Several embodiments include a cooking appliance/instrument (e.g., oven). The cooking instrument can draw an alternating current (AC) power and generate a maximum available power for a heating system of the cooking instrument via a power component that converts the drawn AC power. The cooking instrument can then directionally heat each of different zones in a cooking chamber of the cooking instrument in sequence using one or more heating elements of the heating system on at least one side of the cooking chamber such that each step in the sequence utilizes the maximum available power for the heating system.

Abstract: Several embodiments include a cooking appliance/instrument (e.g., oven). The cooking appliance/instrument can include a cooking chamber, a support tray adapted to hold food in the cooking chamber; and a heating system comprised of at least a heating element. The heating system is adapted to emit waves according to a particular configuration such that the emitted waves is substantially transparent or substantially opaque to the support tray and thus enabling the cooking instrument to select what to heat.