Place bread in toaster and toast until golden brown.
While bread is toasting, heat a large skillet over medium-high and spray with nonstick cooking spray. Cook eggs to preference (I like mine sunny side up but scrambled or over hard works too.)
Remove toast from toasted and spread ¼ of the avocado on each slice, using a knife to carefully press it into the bread like a spread. Sprinkle to taste with salt and pepper.
Top each avocado toast with arugula, ham and an egg. Sprinkle again to taste with salt and pepper before serving.
Notes
You can easily double recipe if you want two slices per person.