You will be given a definition of a task first, then some input of the task.
In this task, you will be presented with the directions of a recipe separated by "," and have to fill in the "___" which is a step that is missing from the recipe.

______,Bring to a boil, reduce heat, cover & simmer 10-15 minutes or until celery and onion are crisp-tender.,Stir in mixed veggies and pasta, cover and cook over medium heat another 20-25 minutes until veggies and pasta are tender, stirring occasionally.,For heartier soup, add 1 lb. cooked ground beef or 2 c. cooked shredded chicken when mixed vegetables and pasta are added.
Output:
In large saucepan, combine all ingredients except mixed vegetables and pasta.