Oven to 425F.
Toss the broccoli in oil and salt on a sheet pan, roast 10 minutes on its own.
Push vegetables to the edges. Lay salmon skin-down in the middle, rub with oil, salt, pepper, dill. Scatter garlic on top, lay two thin lemon slices over each fillet.
Back in for 10 to 12 minutes, until it flakes with light pressure and the centre is just barely translucent. Overcooked salmon is dry salmon, so pull it early.
Squeeze the rest of the lemon over the tray.
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