Cheesy Chicago hot dog croissant-wich | Recipe | Bounded by Buns

Ingredients

• 2 teaspoons vegetable oil
• 1/4 onion, diced
• pinch of salt and pepper
• 1/4 cup cheddar jack cheese, shredded
• 2 tablespoons yellow mustard
• 2 hot dogs, sliced in half
• croissant dough (store bought)
• 1 whole egg
• 1 tablespoon water
• poppy seeds (optional)
• 4 tomato slices
• 2 dill pickle spears
• 4 to 6 sport peppers (or pickled jalapenos)
• 2 tablespoons pickle relish
• celery salt