Prepare salad. Wash and tear lettuce, slice radishes, chop walnuts, and slice blue cheese. Make dressing by whisking buttermilk, mayo, lemon juice, shoyu sauce, garlic, salt, and pepper in a bowl, or placing in a mason jar and shaking. Assemble salad with vegetables on the bottom, then eggs, bacon, walnuts, avocado, and blue cheese. Top salad with dressing.