This is the easiest dinner; filling and very tasty.
You need sour cream, cottage cheese, radishes, scallions, cucumbers. Chop the radishes roughly and put in a bowl. Do the same with the scallions and cukes. Put in separate bowls. Let everyone put sour cream, cottage cheese and vegetables together in their own bowls. Mix up. A little pepper wouldn't hurt.
On the side, you could have some good rye bread or sour dough. My Mother used to slice up a hard boil egg for the table as well.
When you're busy on a project and forget to think ahead about a meal, dairy dinners will save you.