Preheat your oven to 220°C/200°C fan/gas mark 7.
Chop the potatoes into 2cm chunks (no need to peel). Pop them onto a large baking tray.
Drizzle with oil, season with salt and pepper, then sprinkle over half the North Indian style spice mix and half the mustard seeds. Toss to coat, then spread out in a single layer. TIP: Use two baking trays if necessary.
When the oven is hot, roast on the top shelf until golden, 25-35 mins. Turn halfway through.

Meanwhile, in a small bowl, mix together the panko breadcrumbs and remaining North Indian style spice mix.
Add the olive oil for the crumb (see pantry for amount), then season with salt and pepper. Stir to combine.

Pat the sea bass with kitchen paper to remove any excess moisture.
Lay the fillets, skin-side down, onto a lined baking tray. Drizzle with oil and season with salt and pepper.
Spread half the mayo over the top and sides of the fish. Spoon over the breadcrumb mixture, pressing it down with the spoon. Set aside for now. IMPORTANT: Wash your hands and equipment after handling raw fish.

Zest and cut the lime into wedges. Trim the green beans. Peel and grate the garlic (or use a garlic press).
In another small bowl, mix together the remaining mayo with the lime zest. Season with salt and pepper.
About 10 mins before the potatoes are cooked, bake the fish on the middle shelf of the oven until the crumb is golden, 10-15 mins. IMPORTANT: The sea bass is cooked when opaque in the middle.

While everything cooks, heat a drizzle of oil in a large frying pan on medium-high heat.
Once hot, add the green beans. Season with salt and pepper, then stir-fry until starting to char, 2-3 mins.

Stir in the garlic and remaining mustard seeds and cook for 1 min.
Add a splash of water and immediately cover with a lid or some foil. Allow to cook until the beans are tender, 4-5 mins.

When everything's ready, plate up your sea bass with the spiced potatoes and green beans alongside.
Serve with a dollop of zesty mayo and the lime wedges alongside for squeezing over. Enjoy!