In a pan, soften the red onion in the olive oil. Add the garlic clove and fry for 1 minute.
Add the Puy lentils, cover with the hot vegetable stock, bring to the boil and simmer until tender.
Drain, then stir in the feta, semi-dried tomatoes, cherry tomatoes, basil, mint and the lemon zest.
Season, add the lemon juice and drizzle with extra-virgin olive oil to serve.
