Clean the Brussels sprouts by removing the outer damaged leaves and trimming the hard stems. Cut them in half. Peel the sweet potato and cut it into cubes. Dice the smoked tofu. Arrange everything on a baking sheet.
In a bowl, mix all the marinade ingredients: garlic powder, chili flakes, sesame seeds, olive oil, vinegar, miso paste, and maple syrup. Drizzle the marinade over the veggies and tofu, toss to coat, and spread evenly on the baking sheet.
Roast for 35 minutes, stirring halfway through to ensure even cooking.
Serve with crumbled feta and a drizzle of balsamic vinegar.