Combine the natural yoghurt, creme fraîche, lime juice, jalapeno stock and garden herbs in a sufficiently large mixing bowl. Peel the garlic and press it through the press, add together with the jalapeno slices.
Mix everything well with a whisk. Then season with salt and, if necessary, a little more lime juice (for the acidity) or jalapeno sauce (for the spiciness).
Let it steep in the refrigerator for a good 30 minutes. Goes well with baked potatoes, chips or simply as a baguette spread.