he knows , for example , that his tv audience believes itself to be always short of time , so speed of preparation is important ; he knows too that his viewers are health-conscious , and so has cut down on use of cooking oil and deep-frying , and made substitutions in a few recipes , like using turkey instead of beef . ; -lrb- another bit of tinkering , albeit indirect , has to do with one of his program 's corporate sponsors , kikkoman .