This looks like a simple and easy potato salad of the side-dish type.
2-4 cooked potatoes
1 tsp capers
1-2 tsp chopped onion
2 tbs whipping cream
2 tbs mayonnaise
Salt and pepper
Cube the potatoes and mix with onion and capers. Mix together cream and mayonnaise and adjust taste with salt and pepper. Put the potato mixture into the sauce and stir to coat. Cool until ready to serve.
Sprinkle sliced radishes on top for a flavourful garnish.