Preheat oven to 375°F. Spray a baking sheet with nonstick cooking spray.
Butter both sides of the bread. Use a cookie cutter or glass to cut a hole in the center of the bread slice. Place on the baking sheet and bake for 5 minutes.
Remove from the oven and flip each piece over. Crack an egg into a bowl and then pour it into the center of the bread. Place back in the oven and bake for an additional 10-12 minutes. (Check around 8 minutes to see how eggs are cooking. You want them to be white and not transparent.)
Using a spatula, scoop onto plates and serve with your favorite toppings such as salsa, avocado, sliced tomatoes, and shredded cheese.