Buy green, pebbly-skinned Hass avocados and let them ripen at home in a brown bag for two or three days. When the skin turns black, they are ready to use. Jicama is a crisp, sweet-tasting tuber.
Source: Martha Stewart Living, June/July 1992
1 small jicama
2 ripe avocados
Juice of 1 lemon
3 tablespoons balsamic vinegar
6 tablespoons extra-virgin olive oil
Salt and freshly ground pepper
1/2 small red onion, minced
Peel jicama by cutting a thin slice off the top and bottom and paring sides with a small knife. Cut into 1/4-inch-thick slices, then cut slices into thin strips. Set aside.
Cut avocados in half lengthwise. Insert the blade of a heavy knife in pit, twist to remove, and discard. Peel avocado halves. Squeeze lemon juice over avocados to prevent browning; set aside.
Whisk together vinegar, oil, and salt and pepper to taste.
Make a bed of jicama on four plates, and top each with an avocado half. Season lightly with salt and pepper, sprinkle with onion, and pour dressing into avocado cavities. The salad will "dress" itself when you cut into avocados.