Place the summer strawberry spinach salad crowd recipe dressing ingredients—olive oil, balsamic vinegar, honey, Dijon mustard, salt, and pepper—into a small mason jar with a tight lid. Shake vigorously for exactly 30 seconds until the mixture emulsifies and turns slightly opaque; I learned the hard way that under-shaking leaves pools of oil, but over-shaking breaks the emulsion.
Let the dressing sit at room temperature for at least 5 minutes before using it. This step feels like waiting, but it allows the honey to fully dissolve and distribute evenly, which is why your dressing won't separate when it sits in the bowl for an hour at the cookout.
Toast the sliced almonds in a dry skillet over medium heat for 2-3 minutes, stirring constantly until they smell fragrant and turn golden-brown at the edges. I make this mistake every third attempt: I walk away and forget them, and they burn in 30 seconds, so set a timer.
Slice your strawberries into 1/4-inch thick rounds rather than chunks—this increases surface area so they release their juice into the dressing naturally. Sandra actually tested this with me, and the difference between chunky and sliced berries in how the fresh disappears fast dressing absorbs into the greens was genuinely noticeable.
In a large serving bowl, combine the baby spinach, strawberries, red onion, and cucumber in that exact order—this layering prevents the spinach from bruising under the weight of heavier ingredients. Don't toss yet.
Pour the balsamic dressing over everything just 5-10 minutes before serving (or right before you transport to the gathering). This is the hardest part because your instinct says to dress it early, but early dressing causes the spinach to wilt and the berries to break down.
Add the crumbled feta cheese and toasted almonds immediately before tossing, because cold ingredients stay firmer and the heat from the toasted nuts won't wilt anything else. Toss gently with two large spoons rather than a fork—you want the feta to stay in chunks instead of breaking apart.
Transfer to a serving bowl or individual plates, and watch your crowd berry salad cookout disappear within minutes because the combination of colors, textures, and flavors hits every part of the palate.