Heat oven to 180C, 160C fan, gas 4. Trim the stems of the beetroot and reserve any tender leaves that are suitable for eating in the salad. Cut the beetroots into quarters then toss with 1/2 tbsp oil, the coriander seeds, and some seasoning then pile into the centre of a large sheet of foil and wrap up like a parcel. Bake for 45 mins or until the beetroots are tender then top with the salmon, scatter over half the orange zest and return to the oven for 15 mins. If you want to toast the pumpkin seeds, put them in the oven for 10 mins.