Cut the horseradish into fine cubes. Rub or peel off the peel of the lime and squeeze half a lime. Finely puree the horseradish, egg, egg yolk, lime juice, Dijon mustard, salt and pepper and then slowly pour in the oil until a mayonnaise is formed. Mix this with the lime zest and the almond yoghurt. Place in the fridge for at least 30 minutes and serve cold.
This mayonnaise goes well with anything smoked, especially freshly smoked fish.
The oil can be chosen arbitrarily. I always use a mixture of equal parts cold-pressed rapeseed oil, grapeseed oil and virgin olive oil. The yogurt gives the whole thing a light and even fresher note.