Vegetable Muffuletta

Name: Vegetable Muffuletta
Ingredients: Vegetable Muffuletta Sandwich; 1 12 round loaf of bread, or two 8 round loaves (Italian, sourdough, whole wheat, etc.); 2 pounds mushrooms, sliced; 2 carrots, cut into ribbons with a vegetable peeler; 8 ounces spinach leaves, rinsed and dried; 1/2 cup olive oil; 1 cup pitted green olives, chopped fine; 1/2 cup pitted black olives, chopped fine; 1 can artichoke hearts, drained and chopped fine; 1/2 cup parsley, chopped fine; 3 tablespoons thyme, chopped fine; 2 tablespoons oregano, chopped fine; 1 lemon, juice and zest; salt and pepper, to taste; celery root remoulade (recipe below); Celery Root Remoulade; 1 cup mayonnaise (or vegenaise); 1 cup celery root, shredded; 3 stalks celery, minced; 3 green onions, minced; 1/4 cup prepared mustard; 3 cloves garlic, minced; 2 tablespoons capers, drained and chopped; 2 tablespoons paprika; 1 tablespoon prepared horseradish; salt and pepper to taste