Combine all ingredients and whisk until smooth. Set aside for 10 minutes before using.: When you whisk the dressing, pay attention to the texture, it should feel silky and slightly thick, clinging to the back of a spoon; the aroma of fresh garlic and bright lemon juice will lift as you whisk, and you should notice the mustard dissolving into the creamy Greek yogurt . Emulsifying matters because it helps the dressing coat the kale and Brussels sprouts evenly, preventing watery spots and ensuring each bite tastes balanced; if the dressing seems too thin, whisk a moment longer or add a tiny splash more Greek yogurt to thicken. A common mistake is over thinning the dressing with too much liquid; avoid adding extra lemon at first, instead taste and adjust gradually. Also, mince the garlic finely to avoid strong raw bursts that can dominate the dressing.
Toss together the kale and Brussels sprouts and divide into serving bowls. Top with remaining ingredients and drizzle with the dressing. Serve and enjoy!: Allowing the dressing to rest for about 10 minutes helps the flavors meld and the mustard to mellow, and as it sits you will notice the sharpness of raw garlic soften and the honey integrate, producing a more rounded aroma when you return; the dressing will also thicken subtly as the Greek yogurt hydrates and binds the ingredients. This resting period matters because it gives the acid and sweet elements time to harmonize, which prevents a one note dressing from clashing with the greens; if you skip this pause, the dressing may taste more piercing and less integrated. Avoid letting it sit too long uncovered, as the bright citrus aroma can dissipate; store in the fridge if you plan to wait more than 30 minutes. If the dressing separates slightly after resting, a quick vigorous whisk will bring it back together.
Toss together the kale and Brussels sprouts and divide into serving bowls: When you combine the kale and thinly shaved Brussels sprouts , focus on their texture and color; the kale should be dark and slightly glossy, while the sprouts look pale and crisp, and as you toss, you may hear a soft rustle that tells you the leaves are well coated. Tossing evenly is important so the dressing distributes across all leaves, preventing some pieces from being overdressed while others remain dry; I usually toss by hand for the gentlest touch and to feel how the dressing is spreading. A frequent misstep is massing the greens, which can bruise delicate bits and make them limp; instead, use broad, light movements to combine. If your greens look wilted or soggy, you may have overdressed them or used a limp batch; crisp, fresh greens are key to the final texture.
Top with remaining ingredients and drizzle with the dressing: Layer on the red onion , chopped gala apple , toasted sesame seeds , and roughly chopped pecans , allowing each topping to remain distinct so you get a variety of textures in each bite; the sweet apple and buttery pecans should pop against the savory greens. Drizzling the dressing rather than dumping it helps you control coverage, so start with a modest amount and add more if needed, watching how the leaves respond visually as they gain a glossy sheen. This step matters because a measured finish preserves crunch and prevents sogginess; over dressing here is a standard mistake, which can weigh the salad down. If you find pockets of dry leaves, toss briefly to redistribute the dressing evenly.
Serve and enjoy: The final moment is about presentation and timing; serve immediately so the toasted sesame seeds and pecans keep their crunch and the shredded Brussels sprouts remain bright. Listen for that satisfying crunch when you and your guests dig in, and notice the mingling aromas of garlic , mustard, and toasted nuts; these cues confirm the salad is at its best. Serve promptly because waiting will allow the greens to soften and the toppings to lose crispness, a common pitfall when salads sit too long before serving. If you must hold it for a short period, keep the assembled salad chilled and add the dressing at the last possible moment to preserve texture.