A food processing apparatus comprising: a container having an interior; a sieve disposed within the interior of the container and dividing the interior into a processing volume and a collection volume ; and a processing member for processing food disposed within the processing volume; wherein the sieve comprises: a first separation member comprising a set of first holes ; and a second separation member adjacent the first separation member and comprising a set of second holes which are arranged such that they overlap the set of first holes to form a plurality of aligned openings which pass through the first and second separation members for allowing food to pass from the processing volume into the collection volume ; wherein the first and second separation members are movable relative to one other between a first position and a second position so as to vary the degree of overlap of the sets of first and second holes and to adjust the cross-sectional area of the aligned openings ; wherein, in the second position, each aligned opening is defined by portions of each of aforementioned sides (82, 88; 82'; 88') of the first and second holes which are shorter than in the first position such that the aligned openings have a smaller cross-sectional area when in the second position than the first position, characterized in that each aligned opening is formed by two sides of one of the first holes and either: one side of one of the second holes so as to define a triangular cross-sectional shape, or two sides of one of the second holes so as to define a quadrilateral cross-sectional shape. a container having an interior; a sieve disposed within the interior of the container and dividing the interior into a processing volume and a collection volume ; and a processing member for processing food disposed within the processing volume; wherein the sieve comprises: a first separation member comprising a set of first holes ; and a second separation member adjacent the first separation member and comprising a set of second holes which are arranged such that they overlap the set of first holes to form a plurality of aligned openings which pass through the first and second separation members for allowing food to pass from the processing volume into the collection volume ; a first separation member comprising a set of first holes ; and a second separation member adjacent the first separation member and comprising a set of second holes which are arranged such that they overlap the set of first holes to form a plurality of aligned openings which pass through the first and second separation members for allowing food to pass from the processing volume into the collection volume ; wherein the first and second separation members are movable relative to one other between a first position and a second position so as to vary the degree of overlap of the sets of first and second holes and to adjust the cross-sectional area of the aligned openings ; wherein, in the second position, each aligned opening is defined by portions of each of aforementioned sides (82, 88; 82'; 88') of the first and second holes which are shorter than in the first position such that the aligned openings have a smaller cross-sectional area when in the second position than the first position, characterized in that each aligned opening is formed by two sides of one of the first holes and either: one side of one of the second holes so as to define a triangular cross-sectional shape, or two sides of one of the second holes so as to define a quadrilateral cross-sectional shape. <EOS>