Cheesy Artichoke Melts With Crushed Nori

Name: Cheesy Artichoke Melts With Crushed Nori
Ingredients: 8 slices of bread (see Author Notes); 2 (12-ounce) jars whole artichoke hearts in water, drained and squeezed dry; 3 sheets nori (about 8x7 ½ inches), ground into powder (makes about 3 tablespoons); 2 tablespoons soy sauce; 2 tablespoons extra-virgin olive oil; 4 teaspoons freshly squeezed lemon juice; 1 teaspoon Dijon mustard; 1 teaspoon garlic powder; 1/2 teaspoon ground ginger; Freshly ground black pepper, to taste; 8 slices provolone cheese