Storage: Refrigerate cooked patties in an airtight container up to 5 days. Freeze patties up to 3 months (layer with parchment). If the mixture is too wet, add oats or breadcrumbs 1 tablespoon at a time; if too dry, add a splash of water or a little flax mixed with water. Add microgreens right before serving so they stay crisp. Beets can stain—wear gloves if desired.