For the dressing: In a small jar, combine the oil, lemon juice, honey, vinegar, poppy seeds, mustard, salt, and pepper. Seal the jar; shake vigorously to combine. Set aside.
For the salad: Just before serving, add the spinach to a large bowl or platter. Top with half of the strawberries and orange slices. Drizzle with half of the dressing and gently toss to coat. Top the salad with the remaining berries, orange slices, pecans, and goat cheese. Drizzle with your desired amount of the remaining dressing, and serve the remainder on the side, if you like.
