Preheat oven to 375 F.
Combine brussel sprouts, garlic and olive oil in a baking dish. Mix to combine. Roast in oven for 20-25 minutes, until browned and tender.
Meanwhile, cook the soba noodles. Bring a large pot of water to a boil. Add noodles and cook according to package instructions until tender, but still al dente. Drain and run cold water over the noodles.
In a large bowl, combine brussel spouts, green peas, scallions and noodles. Add Furikake and toss to combine.
In a small bowl, combine sesame oil, Mirin and Ponzu. Whisk to combine.
Pour over noodles and vegetables with a little salt. Toss to combine.