Cook the quinoa following package instructions, then drain it really well using a fine mesh strainer and set aside.
Make the lemon vinaigrette using the ingredients above and set aside.
Meanwhile, heat oven to 390F/200C/180C fan/gas 6.
Toss the beetroot and squash with 1 tbsp of the oil and seasoning on a roasting tray, then roast for 30 mins.
Put the quinoa in a salad bowl, mix the chives, parsley, and cherry tomatoes in half, and dress lightly.
Assemble the roasted beetroot and squash on top and crumbled feta.
Add some grated lemon rind, salt, pepper, chives, and parsley to garnish.