Preheat the oven to 375 F / 190 C.
Slice the Brussels sprouts in half from top to bottom, so you cut through the base. This will keep them together, but don't worry if a few of the leaves flake off they will just go extra crispy.
Cut the broccoli into medium-small florets.
Put the Brussel sprouts and broccoli on an oven tray.
Drizzle olive oil and sprinkle salt over the Brussel sprouts and broccoli and then turn the Brussel sprouts to ensure they are flat/cut side down for optimum browning.
Put the tray in the oven and set a timer for 15 minutes.
Check the Brussel sprouts and broccoli to see how they are doing, jiggle the tray a little and if the broccoli is looking charred to perfection, take it out and leave the Brussel sprouts in the oven for a further 5-10 minutes until crispy on the outside and tender on the inside.
Put the charred Brussel sprouts and broccoli into a warm bowl and make your spicy peanut vinaigrette.
Grate the garlic clove using the parmesan setting on a cheese grater so it becomes a mushy pulp. The garlic in this spicy peanut vinaigrette is raw so we grate it so the flavour isn't too overwhelming.