On a large serving platter or in a large serving bowl, layer arugula, strawberries, onion, feta cheese, avocado, sunflower seeds, and radishes.

In a small bowl, combine all vinaigrette ingredients and whisk until fully blended. Taste and season with more salt or pepper, if needed. The dressing should be nice and tangy, but you can add more maple syrup for balance, if desired.

When ready to serve, drizzle salad with vinaigrette and toss to combine. (If making in advance, store salad and dressing separately and toss before serving.