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 (10, 12) for allowing food to pass from the processing volume into the collection volume; wherein the first and second separation members (10, 12) 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 (32, 33) 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 (82, 88) 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 (82', 88') 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 (10, 12) 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 (10, 12) for allowing food to pass from the processing volume into the collection volume; wherein the first and second separation members (10, 12) 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 (32, 33) 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 (82, 88) 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 (82', 88') of one of the second holes so as to define a quadrilateral cross-sectional shape.