Place the 2 cups chopped kale in a large mixing bowl.
Halve the 1 cup cherry tomatoes and add them to the bowl.
Add the 1 cup sliced cucumber to the bowl.
Cut the 1 cup mozzarella cheese into bite-sized pieces and add to the bowl.
Halve the 1 medium avocado, remove the pit, peel (or scoop) and dice the flesh; add the diced avocado to the bowl.
Add the 1/4 cup chopped red onion to the bowl.
In a small bowl or jar, combine 1 1/2 tablespoons olive oil, 1 tablespoon lemon juice, and 1 teaspoon garlic powder; whisk or shake until blended.
Pour the dressing over the salad and gently toss to combine, being careful not to mash the avocado.
Taste the salad and, if desired, adjust flavor by adding more lemon juice, garlic powder, or olive oil from the listed ingredients; toss again and serve.