Steamer insert and method of operating a microwave oven

A microwave oven defining a vertical, a lateral, and a transverse direction, the microwave oven comprising:

• a cabinet defining a cooking chamber;
• a magnetron operably coupled to the cooking chamber;
• a steam cooker assembly comprising a container defining a water reservoir and a steamer insert positioned inside the water reservoir;
• a sensing assembly for monitoring conditions within the water reservoir;
• and
• a controller in operative communication with the magnetron and the sensing assembly, the controller being configured to:
• receive a request to perform a steam cooking cycle using the steam cooker assembly;
• detect a water temperature using the sensing assembly positioned in the water reservoir;
• obtain a food type and a target doneness;
• determine cooking parameters based at least in part on the food type and the target doneness;
• and
• operate the magnetron of the microwave oven to perform the steam cooking cycle in accordance with the cooking parameters.