My neighbor always brought these to block parties. Just 3 ingredients for a creamy, crunchy treat that vanishes instantly.

For a touch more flavor while still keeping the spirit of the recipe, you can choose one simple add-on and use it sparingly: a light sprinkle of salt or freshly ground black pepper over the finished bites, or a few drops of lime juice stirred into the avocado before mashing. If you want more color, swap the red tomato for yellow or orange cherry tomatoes, finely diced. For a slightly richer version, you can mash a spoonful of plain Greek yogurt into the avocado to make it extra creamy, but this will change the character from pure 3-ingredient to more of a guacamole-style spread. To make them ahead, you can slice the cucumber and dice the tomato earlier in the day, storing both covered in the refrigerator. Mash the avocado close to serving time to keep it from browning; if needed, press plastic wrap directly onto the surface of the mashed avocado to slow oxidation. Food safety tips: Always start with clean hands, knives, and cutting boards, especially when working with produce that won’t be cooked. Rinse the cucumber, tomato, and avocado under cool running water before cutting. Because avocado is high in fat and these bites are served at room temperature, don’t leave them out for more than 2 hours (or 1 hour if it’s very hot outside at a block party). Discard any leftovers that have sat out too long or show signs of browning or off smells.