French Toast Breakfast Sandwich & Transitioning From Competitive Skating

This week, I'm getting in touch with my inner Suzy Homemaker by attempting to make a gluten free French toast breakfast sandwich...using a frozen hamburger bun. Bless. 

Questions regarding this meal: 

1. Do you have to technically use toast when you're making French toast? Or, does any bread product work?

2. How could I have made this meal more sweet and French toast-y?

3. What is the best liquid to use? (I used almond milk here.)

4. And, what are you cooking? 

Thank you guys so much for your cooking help over the past few weeks; I appreciate it so much!