Wash all vegetables thoroughly.
Chop the mixed greens into bite-sized pieces.
Dice the cucumber and bell pepper into small cubes.
Halve the cherry tomatoes and set aside.
Finely chop the red onion.
Slice the avocado and prepare it last.
In a large bowl, combine all chopped vegetables.
Drizzle olive oil and lemon juice over the salad.
Season with salt and pepper to taste.
Toss gently to combine all ingredients evenly.