Pretty much any cheese goes well with avocado, so feel free to sub out the American with Gruyère, cheddar, or whatever kind you have on hand for this simple, satisfying breakfast sandwich.

Season with salt to taste and set aside. Make avocado crema: Slice remaining scallions and add to blender with mayonnaise, sour cream, peeled avocado, remaining cilantro, jalapeño and garlic.

For other worthy bagel sandwiches, try filling your favorite bagel with egg, cheese, avocado and ham, to make the ultimate breakfast bagel sandwich recipe. And for lunch, the fillings are limitless.