Preheat the oven to 400°F (200°C).

Trim the broccoli into small florets and spread them onto a baking sheet. Drizzle with avocado oil and sprinkle with salt and pepper. Toss to coat evenly.

Roast the broccoli in the oven for approximately 20 minutes, shaking halfway through for even browning.

In a saucepan over medium heat, pour in mirin and bring to a boil for 2-3 minutes. Reduce heat and whisk in miso paste until dissolved.

Add rice vinegar, avocado oil, and maple syrup to the miso mixture, whisking until boiling. Let it thicken for 3-4 minutes.

Once roasted, transfer broccoli to a large bowl and drizzle with the miso sauce. Toss gently to coat.

Serve immediately while warm, pairing it with your favorite protein or over rice.