1. Chop the onion whilst warming the oil in a pan.
2. Gently fry the onion over a low to medium heat for c 10 minutes; stirring occasionally to prevent from burning.
3. Add the stock and bring to the boil.
4. Pour in the frozen pea and boil for 3-4 minutes until the peas are cooked (but not soggy).
5. Add in a large handful each of pea shoots and fresh mint leaves.
6. Blend until smooth.
7. Return to the heat and season with black pepper to taste.
8. Serve and garnish with fresh mint leaves.