If serving with salmon: preheat the oven to 190C Fan and line a baking sheet with non-stick baking paper. Place the salmon fillets (skin side down) on the baking sheet and drizzle each one with a little olive oil. Roast in the oven for about 8-10 minutes - or until they give way and begin to flake when nudged with a knife.
For the orzo: pour the stock into a medium-sized saucepan and bring to the boil over a medium heat. Once boiling, add the orzo and continue to cook as per packet instructions, adding the petit pois for the last 3 minutes of cooking. Keep an eye on the pan to check the orzo doesn’t stick to the bottom.
Meanwhile, heat 1 tbsp of the olive oil in a medium-sized non-stick frying pan. Add the shallots and cook for about 7 minutes, stirring occasionally, until softened.
Add the garlic and grated courgette and cook for a further 3-4 minutes, stirring occasionally.
Once the orzo is cooked, drain and reserve the stock.
Add the orzo to the pan with the vegetables, alongside 2 tbsp of the reserved stock. Stir well, then season generously with salt and freshly ground black pepper, to taste. Remove from the heat.
While you’re waiting for the orzo to cook and the vegetables to soften, roughly chop the herbs and tip into a bowl. Add the zest of lemon, crumble over the feta and set aside.
In a small bowl, whisk together the Dijon mustard, honey and remaining 2 tbsp olive oil. Drizzle over the herby-feta mix and season to taste - bear in mind that feta is normally quite salty. Squeeze over the lemon juice, if wished.
Stir half of the herby-feta into the orzo.
Divide the orzo serving bowls, top with the salmon fillet (if using), then spoon over the remaining herby-feta mix. Enjoy!