Wash the beet bulbs, pat them dry, and wrap each one individually in aluminum foil, creating small packets.
Place them in a baking dish and bake in a preheated oven at 200℃ (392°F), on the resistances, for about an hour or until a skewer can pierce through, indicating they are cooked.
After they cool down a bit, peel off the skin. If they released any juice during baking, don't discard it.
In a blender, combine all the ingredients, including the beet juice, except for the olive oil. Blend thoroughly.
Then, pour in the olive oil in a thin, steady stream until it is well incorporated with the other ingredients.
If the pesto is too thick, you can dilute it with a bit of oil or water.
Store it in the refrigerator for up to a month in a glass jar with a lid, with a layer of olive oil on the surface.
Notes
TipsIf you want to enhance the flavor and aroma of the nuts, you can briefly toast them in a non-stick pan before using.