This recipe has a secret ingredient: avocado. Use avocado as a replacement for cream cheese, butter or mayonnaise on a breakfast sandwiches. Not only will you replace the bad fat with a heart-healthy fat but you'll save a few calories, feel fuller longer and add some fiber, potassium and vitamins C, K and B6 to your diet.
Add the avocado to a bowl and mash well with a fork. Add the lemon juice and a sprinkle of salt and pepper. Divide the avocado between both pieces of bread and spread from corner to corner. Divide the hard-boiled egg between the toasts. Top each toast with a slice of tomato.