Next, slice the avocado in half. Scoop out the flesh into a bowl. Add a squeeze of lemon to keep the color a pretty bright green. Sprinkle with salt. Add the pesto. Mash everything together. Keep the texture chunky - this gives it a great texture.
Slather the avocado pesto on the toast.
Slice the tomatoes and arrange them on top. Sprinkle lightly with salt and pepper. Serve and enjoy!