Rinse beets and scrub (if there's visible dirt). Place in the Instant Pot on a steaming rack with 1 ½ cups water. Set the Instant Pot to High pressure for 25 minutes. Allow 10 minutes for a natural release of the pressure.

Combine herbs, lemon juice and zest, nuts, olive oil, garlic cloves and salt and pepper to taste in a food processor or blender. Process until smooth.

Remove the beets from the Instant Pot and rinse under cold water. When they're cool enough to touch, slip off the skin (using gloves). Slice or dice the beets.

If using two colours of beets, toss them the sauce separately and refrigerate for several hours or overnight.

Before serving, combine the two colours of beets together. Serve cold or at room temperature.