Remove seeds and veins from the jalapeño pepper and dice finely.
Place diced jalapeño pepper, onion, cilantro leaves and course sea salt in food processor or blender and pulse ingredients to a paste similar to what is shown in the post. Be careful not to purée ingredients.
Place processed ingredients into a dish large enough to also hold the avocados.
Add the lime juice to the dish and stir to combine.
Slice avocados lengthwise around pit and remove pit using the blade of a knife. Remove avocado flesh and chop coarsely before adding to ingredients in dish. Mash avocado with a fork, mixing with previously processed ingredients. As indicated above, we prefer a chunkier guacamole and, therfore, leave some larger pieces.
Stir in the diced tomato and garnish with some additional cilantro, some paprika or some hot chilli flakes, as desired.