Cut bacon into 1cm squares and heat in a toaster for about 5 minutes. Cut avocado in half, remove the seed and skin, and dice into 1cm cubes. Place in a bowl and drizzle with lemon juice. Dice carrot into 1cm cubes, place in a microwave-safe container, cover loosely with plastic wrap, and microwave at 600W for 3 minutes.

Cut potatoes into bite-sized pieces, soak in water for 5 minutes, and drain. Place in a microwave-safe container, cover loosely with plastic wrap, and microwave at 600W for about 6 minutes.

Mash the warm potatoes and mix in vinegar and salt. Let cool slightly.