Given the task definition and input, reply with output. 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.

Cook noodles in boiling water for 7 minutes. Rinse in cold water and drain well.,Melt butter and mix with noodles.,Mix sour cream and cottage cheese together.,Add to noodles and mix well. Put in baking dish and sprinkle Parmesan cheese on top.,______
Bake at 350 for about 20 to 30 minutes.