- 2 tablespoons fresh lime juice
- 3/4 cup (loosely packed) watercress leaves, plus extra for garnish
- 1/2 medium white onion, chopped into pieces no larger than 1/4 inch (1/3 cup)
- 3 ripe medium to large avocados
- 2 tablespoons tahini
- 1 large fresh Serrano or small jalapeño, stemmed
- 1 1/2 tablespoons sesame seeds
- 3 garlic cloves, unpeeled
In a small, dry skillet, roast the garlic cloves and chile over medium heat, turning regularly, until theyre soft and splotchy black in places, about 5-10 minutes for the chile, 15 minutes for the garlic. Finely chop the garlic and chile. Scoop into a large bowl.
While the garlic and chile are roasting, measure the sesame seeds into another small skillet and set over medium heat. Stir until they are fragrant and golden, 4-5 minutes. Cool.
Cut the avocados in half, remove the pit then scoop the flesh from each half into the bowl with the garlic. Measure the tahini into the bowl, along with 1 tablespoon of the toasted sesame seeds. With an old-fashioned potato masher, a large fork or the back of a large spoon, coarsely mash the avocado with everything thats in the bowl, mixing it evenly.
Scoop the chopped onion into a strainer, rinse under cold water, shake off the excess and add to the bowl. Gather the watercress leaves together and slice them thinly into a chiffonade. Add them to the bowl, along with the lime juice. Stir gently to combine, then taste and season with salt, usually about 1 teaspoon. Cover with plastic wrap pressed directly on the surface of the guacamole and refrigerate until youre ready to serve.
To serve, scoop the guacamole into a serving bowl, decorate with watercress and sprinkle with the remaining sesame seeds.