Clean the beets and place them individually in small closed-up foil packets.
1 lb beets
Place them in a baking dish and roast for about 45 minutes to an hour, until a fork enters the flesh easily. Set aside to cool.
When cool enough to handle, cut the beets into ½-inch cubes and place in a bowl with about 2 tablespoons cooking fat. Toss well to coat the beets all over with the fat.
Cooking fat
Combine the mayonnaise in a bowl together with the dill, horseradish and season to taste with salt and pepper.
½ cup homemade mayonnaise, 1 tablespoon prepared horseradish, 2 tablespoon fresh dill, Sea salt and freshly ground black pepper to taste
Place a bed of roasted beets on each plate and add the mayonnaise on top. Place the sardines on top of the mayonnaise.