celery - watch the video to see (a couple of handfuls, roughly chopped or trimmings)
carrots - watch the video to see (a couple of handfuls, roughly chopped or trimmings)
fennel - watch the video to see (a couple of handfuls, roughly chopped or trimmings)
leeks - watch the video to see (a couple of handfuls, roughly chopped or trimmings)
onions - watch the video to see (a couple of handfuls, roughly chopped or trimmings)
Parmigiano Reggiano rind - 100g (for stock)
sea salt - watch the video to see (to season stock and polenta)
black pepper - watch the video to see (to season stock and polenta)
Parmigiano Reggiano stock - 900ml (for cooking polenta)
quick-cook polenta - 200g (instant polenta)
butter - 50g (salted butter for richness)
Parmigiano Reggiano - 100g (finely grated, to mix into polenta and for serving)
baby spinach - 100g (roughly chopped)
roasted red peppers - 350g (roughly chopped, jarred)
eggs - 4 (to bake on top of polenta)