Cook your food. I realize some people prefer it raw but from what I understand, cooking food kills ecoli. My family has eaten lettuce that has had ecoli reports but we usually thoroughly cook or vegetables.
1. Tear the lettuce into large pieces, boil it for half a minute, and wipe off the water.
2. Mix 1 tablespoon each of oyster sauce and water, 1 teaspoon each of soy sauce and sesame oil, put it in the microwave for 20 seconds, and pour it over the lettuce.