Peel the avocados, remove the stone, cut the meat into cubes and drizzle with the lemon juice. Mash the pine nuts a little and mix with the gherkin slices into the avocado cubes. Add the oil and season with salt and pepper.
Grate the garlic cloves with a little coarse salt, stir into the yoghurt together with the peppermint and whip lightly with a fork. Put on the salad, but mix well before serving. Serve the salad well chilled.