Step 1

Boil, steam or microwave potato until tender; drain.

Step 2

Meanwhile, make basil pesto.

Step 3

Combine mayonnaise and pesto in large bowl; add onions and hot potato, mix gently.

Step 4

Serve salad topped with combined basil and zest.

Step 5

Process basil, cheese, nuts and garlic until chopped finely. With motor operating, gradually add oil in a thin, steady stream; process until almost smooth.