Preheat oven to 400 degrees.
Chop broccoli crowns into large chunks, or strips. Place on a silicone mat lined baking sheet.
In a small bowl, whisk together the olive oil, hoisin sauce, sriracha, garlic, ginger, salt and pepper. Pour this over the broccoli, and toss to combine.
Place the baking sheet in the oven and roast the broccoli for 17-20 minutes, or until it is fork tender. Remove from the oven and sprinkle with toasted sesame seeds and cilantro. Serve immediately.