; Convection function to literally bake anything - from cakes, cookies, breads, pizzas - I mean everything! Be aware when you start to cook in a convection microwave that everything may be done more quickly than it would in a conventional oven, even if you use the convection only setting. The microwave rays penetrate thick foods, like whole birds, for quick cooking, while the convection currents and ambient heat give the outside a nice finish. The sizes and weight of such devices are usually 1,5–2 times bigger than of usual microwave ovens. Built in. ; Grill for grilling vegetables, meat and the kind. Basic microwave functions : There are three basic functions a microwave can perform - cook, bake, grill. Microwave function for regular cooking, de-frosting, re-heating and even some instant mug cakes (more below). Microwave ovens with a convection feature can be of two types: Autonomous.