In a mixing bowl, mash the avocado and add the lime juice. Mix until well combined.
Toast the bread. Smash 1/4 cup of the avocado mix on the slice of the toasted bread. Next, lay 1 egg sliced all over the smashed avocado. Next layer 1 Tbsp. of sliced radishes in between the egg slices. Sprinkle 1/8 tsp of everything bagel seasoning over the toast for garnish. Top with 2 Tbsp. of arugula.