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.

Heat butter in a 12-inch heavy skillet over medium heat until foaming, then cook onions with scallion, garlic, salt, and 1/4 teaspoon pepper, stirring occasionally, until softened but not browned, about 5 minutes,______, Add 1/2 cup water and simmer gently, stirring, until shrimp are just cooked through, 2 to 3 minutes (shrimp should be saucy; add more water if necessary), Season with salt and pepper and serve immediately,
Output:
Add shrimp and cook, stirring, 1 minute