**Prepare the Custard**
- In a mixing bowl, whisk together eggs, milk, heavy cream, sugar, vanilla extract, cinnamon, and salt until smooth.
**Dip the Rolls**
- If the rolls are connected, you can slice them in half horizontally while keeping them intact, or separate them individually. Dip each roll (or the whole sliced sheet) into the custard mixture, ensuring they’re well-coated but not overly soggy.
**Cook the Rolls**
- Heat a skillet or griddle over medium heat and lightly grease with butter or nonstick spray. Place the custard-coated rolls onto the skillet and cook for 2–3 minutes per side, or until golden brown.
**Keep Warm (Optional)**
- Transfer cooked rolls to a baking sheet in a warm oven (200°F/93°C) while you finish cooking the rest.
**Serve and Enjoy**
- Plate the Hawaiian Roll French Toast and garnish with your choice of toppings.