2 lbs Louisiana blue crab meat, jumbo lump
1/2 lb unsalted butter, divided
1-1/2 cups minced onions
1 cup diced celery
1 cup small diced green bell peppers
1-1/2 cups all-purpose flour
1 cup white wine
2 cups milk
2 cups heavy cream
2 cups white cheddar cheese, grated, divided
2 cups grated Parmesan cheese, divided
1/2 cup chopped parsley
2 Tablespoons fresh lemon juice
2 teaspoons Original TABASCO® brand pepper sauce
1 teaspoon Worcestershire sauce
4 teaspoons Creole seasoning, divided
1/2 teaspoon nutmeg
salt, to taste
ground white pepper, to taste
1 cup chopped green onions
2 cups panko breadcrumbs
2 loaves French bread, sliced and toasted