AVOCADO AND CORN SALSA

1 ripe avocado, cut into 1/2-inch dice
3 tablespoons fresh lime juice
1 ripe red tomato, seeded and cut into 1/4-inch dice
1 ear sweet corn, shucked
TO SERVE:
1 scallion, both white and green parts, trimmed and finely chopped
1 jalapeno pepper or serrano chilies, seeded and minced (for a hotter salsa, leave seeds in)
1/4 cup chopped fresh cilantro
Coarse salt (kosher or sea) and freshly ground black pepper

Place the avocado in the bottom of a nonreactive mixing bowl and gently toss with 2 tablespoons of the lime juice. Spoon the tomato on top of the avocado.

Cut the kernels off the corn. The easiest way to do this is to lay the cob flat on a cutting board and remove the kernels with lengthwise strokes of a chef's knife. Add the corn kernels to the mixing bowl.

The salsa can be prepared to this stage up to 2 hours ahead. Refrigerate it, covered.

TO SERVE:
Just before serving, add the scallions, jalapeno and cilantro to the mixing bowl and gently toss to mix.

Taste for seasoning, adding more lime juice as necessary and season with salt and pepper to taste; the salsa should be highly seasoned.