Put the romaine lettuce in a salad bowl and set aside. Put the cashews, filtered water, chopped garlic, lemon juice, pumpkin seeds, salt and pepper in a blender and blend until creamy. Stir in capers to taste, if using, and blend again. Pour the dressing over the lettuce and mix. Add additional capers and the avocado pieces if using.For the Brazil Nut Parmesan:Place the Brazil nuts, 2 cloves minced garlic and salt in a food processor and pulse until fluffy. Do not over-process into a paste or leave big chunks by under-processing. Serve the dressed Caeser salad garnished with the Brazil Nut Parmesan.