Outline
The invention relates to a method and apparatus for preparing foods having two or more components hardenable by heat treatment, particularly egg bar, the method comprises the step of filling a first component (I.), e.g. egg-yolk, forming an inner core of the food to be prepared into an inner tube (5) of a filler device (1) formed by concentric tubes, cooking and hardening the first component (I.) by a liquid circulating in an intermediate tube (23), delivering the hardened core in a casing (12) sealed at its bottom end, filling the space around the core by a second component (II.) of liquid state, e.g. egg-white, through an outer tube (14) of the filler device (1), sealing the upper end of the casing (12), and detaching the semi-processed product (29) from the filling device (1) and introducing it in a boiling trough (4) containing a liquid bath for cooking the product (29).