Combine ingredients for dressing in a blender or Nutri-bullet and blend until smooth. Refrigerate until serving.
Preheat oven to 400ºF and lime a medium baking sheet with parchment paper. Add Brussels sprouts and sweet potato. Drizzle with olive oil and season with sea salt and pepper. Gently toss with hands to coat. Roast for 25 minutes, stirring halfway through cooking. Remove from oven and cool at room temperature while cooking steak.
Heat olive oil over medium-high heat in a cast-iron pan for 2 minutes. Season steaks with salt and pepper on both sides. Place onto the hot pan and sear for 4-5 minutes on each side, depending on thickness and desired doneness (rare, medium, well). Rest steaks on a cutting board for 5 minutes.
Add 2 cups of kale to 4 GoodCook round containers and top with fennel, roasted vegetables, pecans, blue cheese and sliced steak. Add dressing to 4 sauce cups included in the package. Store in refrigerator until enjoying.