In a small skillet, toast sesame seeds over medium-high heat, shaking, until golden brown, about 1 minute.
Transfer to plate and set aside to cool.
In a large bowl, toss kale with salt and 1 tsp. vegetable oil and rub into kale to soften. Add Brussel sprouts and toss well.
In a small bowl, whisk together garlic, vinegar, soy sauce, sesame oil, and remaining Tbsp. vegetable oil.
Pour dressing over greens, add reserved sesame seeds and toss well.
Garnish with a pinch of red pepper flakes (optional) and scallions… Serve and enjoy!