Place toast in a toaster/toaster oven and allow to toast for 5-10 minutes at 300 degrees F.
Slice avocado, cucumber, and tomato thinly. Set aside.
When toast is golden brown and crispy, layer cucumber on and sprinkle sparingly with garlic salt. Then layer tomato and sprinkle sparingly with garlic salt.
Lastly, top with avocado.
Add a little splash of fresh squeezed lime juice on top of avocado toast. Add a small sprinkle of garlic salt and fresh ground black pepper.