For the everything bagel mix (optional):

• 1 Tbsp sesame seeds
• 1 Tbsp poppy seeds
• 1 Tbsp dried garlic (whole pieces, not garlic powder)
• 1 Tbsp dried onion (whole pieces, not onion powder)
• ½ Tbsp thick sea salt

For the challah dough:

• 1 ½ Tbsp dry active yeast
• 1 tsp sugar
• 1 ¼ cups lukewarm water
• 4 ½-5 cups of all-purpose, unbleached flour (preferably King Arthur flour)
• ¼ cup vegetable oil
• ½ Tbsp salt
• ¾ cup sugar
• 2 eggs

To assemble:

• 2 packages kosher hot dogs
• 1 egg + 1 tsp water
• 3-5 Tbsp everything bagel mix or sesame seeds, poppy seeds, black sesame seeds, caraway seeds and/or thick sea salt (optional)
• mustard, to serve (optional)