Green Goddess Sandwich

Name: Green Goddess Sandwich
Ingredients: 1 cup daikon radish, julienned; 1 small white onions, sliced; 2 teaspoons sugar; 1 teaspoon salt; 1/4 cup white balsamic vinegar (or white wine vinegar); 1/2 cup warm water; 1/2 cup mayonnaise; 1/4 cup packed basil leaves; 1/4 cup packed tarragon leaves; 1/4 cup packed chopped chives; 2 cloves garlic, grated; 2 teaspoons anchovy paste (or 2 anchovy fillets, chopped); 1/2 lemon (zest and juice); salt and pepper to taste; 8 slices bread; 1 (8 ounce) ball fresh mozzarella, sliced; 1 large tomato, sliced; 1 avocado, sliced; 1 cup baby spinach (or 4 leaves lettuce); 1 cup micro-greens/sprouts