Sandwich Simplicity

It seems I have been retreating back to my sandwich days as of late

I promise to start getting more creative with my sandwiches soon, 

but I just have to pick up some more toppings because it seems

 I have been stuck with the same ingredients over and over again

A poached egg, sliced chicken meat, red onion, lettuce, tomato 

and black pepper between 2 toasted gluten-free english muffins

And even though my meals have been fairly basic,

 they're still jam-packed with flavor; Simplicity is sweet

Question: What suggestions do you have for different

 sandwiches I can make to help get me out of my food rut?