In a small bowl with a whisk, or in a jar with a tight-fitting lid, add the oil, vinegar, honey, poppy seeds, and salt + pepper.
Stir or shake to combine. Allow the flavors to blend at room temperature while preparing the salad.
In a salad bowl toss together spinach, strawberries, avocado, cucumber, and radishes. Drizzle about 1/3 of the dressing (or more) over salad. Serve immediately. Enjoy!