Put the pasta in the boiling water. Clean the spring onions and cut into fine rings. After the 10 min. Cooking time, add the cream and horseradish as desired (approx. 2 teaspoons) to the beetroot, stir well and season. A squirt of lemon juice or two gives the necessary acidity. Now fold in the drained spaghetti and arrange nicely on the plate with the spring onions.