Step 1

Place blueberries, raspberries, balsamic vinegar, honey, lemon juice, salt, and pepper for vinaigrette to a blender. Blend for at least 1 minute.

Step 2

Keep the blender running and remove the air cap. Pour in olive oil in a slow, steady stream. Blend until vinaigrette is smooth and emulsified, 10 to 15 seconds.

Step 3

Combine lemon juice, honey, salt, and pepper for salad in a large bowl; whisk until combined. Drizzle in olive oil while whisking rapidly until the mixture is smooth.

Step 4

Add arugula, all fresh berries, walnuts, and cranberries to the bowl; toss well to coat with lemon juice mixture.

Step 5

Divide salad among four serving bowls. Drizzle each with desired amount of vinaigrette. Serve immediately.