Step 1

Cook pasta in a large saucepan of boiling salted water for 8 minutes or until almost tender. Add asparagus; cook a further 1 minute until tender. Drain. Rinse under cold water; drain.

Step 2

Process basil, pine nuts, garlic, oil, juice and the water until finely chopped. Add avocado and half the feta; process until smooth. Season to taste.

Step 3

Place pasta, asparagus and pesto mixture in a large bowl with prawns; toss gently to combine.

Step 4

Divide pasta among bowls; top with remaining feta and extra basil leaves.