Toast the slice of whole-grain bread to your desired level of crispiness.
While the bread is toasting, cut the small avocado in half, remove the pit, and scoop the flesh into a bowl.
Mash the avocado with a fork until you reach a smooth consistency. Season with salt and black pepper to taste.
Spread the mashed avocado evenly over the toasted bread.
Sprinkle red pepper flakes on top for an extra kick, if desired. Serve immediately.
Notes
For added flavor, consider drizzling a small amount of olive oil or adding a squeeze of lemon juice on top of the avocado spread. You can also top with cherry tomatoes, radishes, or a poached egg for variety.