Giant Stuffed Cabbage

Name: Giant Stuffed Cabbage
Ingredients: 3 tablespoons olive oil; Kosher salt and freshly ground black pepper; 1 pound savoy cabbage leaves (from 1 small head); 1 small onion, finely diced (about 1 cup); 1 clove garlic, finely chopped; 1 medium carrot, finely diced (about 1/2 cup); 1 stalk celery, finely diced (about 1/2 cup); 1 tablespoon fresh thyme, finely chopped; 1 teaspoon paprika; 1 pound ground chuck; 2 tablespoons fresh parsley leaves, finely chopped; 3/4 cup long-grain rice; 1 large egg, lightly beaten; 2 1/2 cups marinara sauce