Place first 4 ingredients in a bowl and toss to combine.: The aroma here is subtle, mostly fresh green notes from the spinach and a faint earthiness from the thinly sliced mushrooms . You should see a bed of glossy, verdant leaves dotted with bright red slivers of strawberries and pale crescents of mushrooms . Toss gently so the fruit does not get crushed, using a light lift and turn motion. If the spinach looks wilted or limp, it may have been stored too warm; chill it briefly to restore crispness. Avoid using too much force when tossing, as that can bruise the delicate leaves and release excess liquid from the strawberries . The goal is even distribution of ingredients so every forkful has color and texture.
Place remaining 5 ingredients in a bowl and whisk to combine.: As you whisk the honey , olive oil , cider vinegar , poppy seeds , and kosher salt , watch the vinaigrette come together into a glossy emulsion. You'll notice the aroma shift to bright and tangy with a warm sweet undertone from the honey . Whisk briskly until the oil and vinegar form a coherent dressing, about 20 seconds. If the dressing separates quickly, add the honey first and whisk it into the vinegar before slowly streaming in the olive oil , which helps stabilization. A common mistake is adding oil too quickly, which prevents a smooth emulsification and leaves an oily dressing that does not coat the salad properly.
Toss the dressing with the salad.: When you pour the dressing over the salad, do so in a slow, even stream while lifting and turning the greens with salad tongs or two large spoons. The sound should be a soft rustle as the leaves catch the dressing and the visual should be a light sheen on each spinach leaf, not a puddle at the bottom of the bowl. If you see pooling, you have added too much dressing; spoon some out or add a few more leaves to balance it. Tossing properly ensures the dressing clings to the strawberries and spinach , distributing flavor evenly without overwhelming any component.
Serve.: The final plate should look vibrant, with glossy spinach and bright, evenly distributed strawberries , punctuated by the toasted almonds . Listen for a light crunch when you lift a forkful, and smell the combined notes of fruit, oil, and a hint of honey sweetness. Serve immediately so the spinach remains crisp; if it sits too long, the leaves will soften and the salad can become soggy. A common pitfall is dressing the salad too far ahead, which leads to limp greens and lost texture. Plate promptly and enjoy the contrast of temperatures, textures, and flavors that make this salad sing.