Heat your oven to 180°C/Fan 160°C/Gas 4. Tip the quinoa into a sieve and rinse well under cold water for a few mins. Shake any excess water off and leave to one side to dry a little.
Trim the courgette. Halve it lengthways, then cut into half-moons around 1cm thick. Quarter the vine tomatoes. Arrange both on a baking tray. Drizzle over ½ tbsp oil and season with salt and pepper. Slide into the oven and roast for 20 mins.
Peel and finely chop the onion. Peel and crush the garlic. Heat a pan for 1 min. Add ½ tbsp olive oil, the onion and some salt and pepper. Gently cook for 5 mins till glossy. Add a splash of water if it's sticking.
Stir in the crushed garlic and cook for 1 min. Tip in the rinsed quinoa and stir for 1 min.
Crumble in the stock cube. Pour in 500ml boiling water. Bring to a simmer, then cook on a low-medium heat for 20 mins, uncovered, till all the water is absorbed and the tendrils from the quinoa have unfurled. Stir every now and then.
While the quinoa cooks, snap the woody ends from the asparagus. Once the courgette and tomatoes have cooked for 20 mins, remove the tray from the oven. Lay the asparagus in the tray. Slide back into the oven for another 10 mins.
Grate the zest from the orange and stir this through the quinoa. Taste and season. Squeeze in a little orange juice if you like.
Spoon the quinoa into 2 warm shallow bowls. Arrange the veg on top. Snip over the chives with a pair of scissors. Serve with the rest of the zested orange, sliced into wedges for squeezing.