In a small bowl whisk together the champagne vinegar, lemon juice, honey, garlic powder, and olive oil. Add the fresh basil and parsley and whisk again.
In a large bowl, combine the avocados, English cucumber, cherry tomatoes, and red onion.
Drizzle with the lemon honey vinaigrette and gently toss. Season with salt and pepper to taste. For best results, serve promptly.