Prepare Ingredients: Wash the spring mix salad greens under cold water and dry them thoroughly with a salad spinner. Slice the cherry tomatoes in half and thinly slice the cucumber. If using red onion, slice it thinly as well. Set aside all the ingredients.

Assemble Salad: In a large mixing bowl, combine the dried salad greens, halved cherry tomatoes, cucumber slices, and red onion. Toss gently to mix the ingredients, sprinkle the desired amount of feta or goat cheese on top, followed by toasted walnuts or pecans.

Make Dressing: In a small bowl or mason jar, combine balsamic vinegar and honey, whisking together until well blended. Gradually drizzle in the olive oil while whisking continuously to create an emulsion. Adjust seasoning with salt and pepper.

Combine: Just before serving, pour the balsamic honey dressing over the salad ingredients and gently toss to coat everything evenly.

Serve Immediately: Transfer the salad to a serving platter or individual plates and enjoy right away for the best fresh taste.