I could eat a field roast dog from Happy Dog every day of my life.
This is easily my new favorite restaurant. They have so many options to customize your hot dog that it is just crazy. Some of our favorites:
"Breakfast Dog" had fruit loops, peanut butter, and an egg. My son insists it was delicious, although I didn't try it myself.
"Chili Dog" had vegetarian chili, garlicky escarole, mushrooms, carmelized onions, and black truffle dijon mustard (they call it black truffle honey mustard, but it is definitely dijon.). It was amazing.
They have a card that lists which of their toppings are vegetarian, vegan, and gluten free. It is a handy little list and makes it really easy to check.
Their tots are amazing, although I didn't care for the fries. You can order as many dipping sauces as you want and they come on the side.
Also, they have a great list of beers on tap.