Grilled Cheese Dogs (Crispy, Cheesy, Ready in 20 Minutes)

Ingredients

• 4 hot dog buns, split but still attached
• 4 beef hot dogs, split lengthwise but not cut all the way through
• 1 1/2 cups (170 g) shredded sharp cheddar cheese
• 1/2 cup (55 g) shredded Monterey Jack cheese
• 2 scallions, thinly sliced
• 3 tablespoons (42 g) unsalted butter, softened
• 1/2 teaspoon garlic powder
• 1/4 teaspoon onion powder
• 1/8 teaspoon black pepper
• Mustard, ketchup, pickle spears, or hot sauce, optional