Season and Sear Salmon: Season the salmon fillet with salt and pepper. Sear on all three sides of the flesh lightly, then finish on the skin side in a medium heat pan.
Rest the Salmon: After searing, turn the heat down and let the salmon rest in the pan, skin side down, for about 2 minutes, then turn off the heat and leave it to rest.
Prepare Garnish: In the same pan, add cherry tomatoes with a bit of salt and pepper to blister in the residual oil. In another pan, warm blanched green beans with salt and pepper.
Finish Potatoes: Halve pre-boiled new potatoes and toss in a pan with butter, salt, pepper, finely sliced garlic, and lemon zest. Add chopped parsley and dill.
Assemble the Dish: Arrange the green beans, potatoes, and salmon on a plate. Serve with a wedge of lemon and optionally drizzle with the buttery, garlicky, herby mix from the potatoes.