Step 1: Place your bread into a toaster and let things heat up while you scoop out the avocado and mash it in a bowl using a fork.
Step 2: Season the avocado with a little salt and pepper and finely slice the red onion on the side.
Step 3: Once the bread has made the wonderful transformation into its crunchy counterpart, spread the avocado on top.
Step 4: Layer the red onion and smoked salmon on top with a squeeze on lemon and voilà !