Place a cutting board on a stable surface and use a chef's knife to dice the peeled watermelon into bite-sized chunks, ensuring they are evenly sized for uniform appearance and texture.
Using the same knife and cutting board, peel and pit the avocados, then slice them into thin, even pieces. Arrange the avocado slices aside, ready to be assembled.
Transfer the diced watermelon into a large mixing bowl and gently season with salt and black pepper if desired, mixing lightly to distribute the seasonings evenly.
4 cups watermelon
On a serving plate, evenly layer the seasoned watermelon chunks and arrange the sliced avocado over the top, creating a colorful, layered presentation.
4 cups watermelon
Once plated, serve immediately to enjoy the fresh textures and vibrant appearance of the salad.