Place the mint, avocado, garlic, lemon juice, oil, salt, pepper and 1 cup of the peas in a small food processor and process until smooth. Set aside.
Cook the pasta in a large saucepan of boiling salted water for 6 minutes or until al dente. Drain, reserving 1⁄2 cup of the cooking water.
Place the pasta, pesto and remaining peas in a large bowl. Add pasta water, a tablespoon at a time as needed to get the desired texture, and toss to combine. Divide between bowls and top with grated locatelli and toasted breadcrumbs if desired. Drizzle with good olive oil and serve.