2 packages pre-grilled unagi (enough for 8 slices)
2 cups cooked sushi rice
2 tablespoons rice vinegar
1 tablespoon sugar
½ teaspoon salt
1 nori sheet (cut into ½ inch stripes
½ cup soy sauce
½ cup mirin
¼ cup sake
¼ cup dark brown sugar
3 garlic cloves (peeled and mashed))