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.

About 1 hour before serving, prepare noodles as label directs. Meanwhile, in 3-quart saucepan, over medium heat, in hot salad oil, cook celery and onion until tender.,______,Drain noodles; add, with tuna into saucepan and toss to coat.,Spoon mixture into deep 2-quart casserole.
Preheat oven to 350. Into vegetables in saucepan, stir undiluted soup, milk and mayonnaise.