PREPARE BRUSSELS SPROUTS FOR ROASTING: Place in a bowl of cool water. Any debris will float down to the bottom of the bowl, so lift brussels sprouts out and into a colander. Trim off the bottom and then cut through from the head to the tip vertically to cut the sprouts in half.
Place sprouts on rimmed baking sheet, large enough to hold them in one layer, and toss with 2 Tablespoons of the oil and salt. It's important not to overcrowd, so use 2 baking sheets if needed.
Roast for 25 minutes, until browned with caramelized edges.
Meanwhile, whisk together sriracha, honey, lime juice and remaining 2 Tablespoons of oil.
Use a spatula to move brussels sprouts to serving bowl and pour on the sweet and spicy sauce, to taste.
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Notes
LEFTOVERS: If you have any (we never do), you can put them onto a rimmed baking tray in a single layer to reheat. Preheat oven to 350 and heat for 10-12 minutes, they'll crisp up again.