Preheat the oven to 450 degrees.
Line a baking sheet with a silpator tin foil, if using foil, spray lightly with nonstick spray.
Combine the miso, oil, soy sauce, vinegar and red pepper flakes in a small bowl. Whisk well to combine.
Toss the cauliflower with the miso mixture and spread in a single layer on the baking sheet.
Roast for 25-30 minutes, until well browned. Toss with fresh cilantro and serve immediately, with lime wedges.