Slice avocado in half and remove the pit. Use a spoon to scoop out enough avocado to create a bigger hole that the salmon will fit into. Transfer scooped out avocado to a small bowl.
Drain the salmon and add it to the bowl with the scooped out avocado. Add lemon juice and mash until well mixed.
Fill the hollowed out avocado halves with the mashed salmon mixture. Enjoy!