Coarsely chop the capsicum. Thickly slice the onion. Thinly slice the silverbeet stems and coarsely chop the leaves, keeping them separate. Cut the baby broccoli widthwise into thirds. Crumble 1 stock cube* into a heatproof jug, add half the tomato paste* and 200ml boiling water and stir to dissolve.
Step 2 — Make sauce
Bring a medium saucepan of water to the boil for the greens. Heat 1 tbs olive oil in a medium deep frypan over high heat. Cook the capsicum, onion and silverbeet stems, stirring, for 2 mins or until slightly softened. Stir in the tomato stock, olives, half the Italian seasoning* and a pinch of chilli flakes, if using, and bring to a simmer.
Step 3 — Add fish
Season the fish with salt and pepper, then add, flesh-side down, to the sauce. Reduce the heat to medium-low, cover and cook for 4 mins. Turn the fish and cook, skin-side down, for a further 5 mins or until the fish is cooked through (see Kitchen 101).
Step 4 — Cook greens
Meanwhile, add the baby broccoli to the pan of boiling water and cook for 1 min. Add the silverbeet leaves and cook for a further 2-3 mins until the greens are tender. Drain, then return to the pan. Season with salt and pepper.
Step 5 — Serve up
Divide the fish, sauce and greens among plates and enjoy!
Step 6 — Kitchen 101
Not sure if your fish is cooked through? Simply use a fork or the tip of a knife to take a peek inside the thickest part of the flesh; if it comes apart easily, the fish is cooked.