1 1/2 lbs beef flank steak, cut into 1 inch cubes |
2 tablespoons garlic, minced (marinade) |
1 1/2 tablespoons sugar (for marinade) |
2 tablespoons oyster sauce (for marinade) |
1 tablespoon fish sauce (for marinade) |
2 teaspoons sesame oil (for marinade) |
1 teaspoon dark soy sauce (for marinade) |
2 tablespoons peanut oil |
1/2 cup rice vinegar (for vinaigrette) |
1 1/2 tablespoons sugar (for vinaigrette) |
1/2 tablespoon salt (for vinaigrette) |
1 lime (squeezed, for dipping sauce) |
1/2 teaspoon kosher salt (for dipping sauce) |
1/2 teaspoon pepper (for dipping sauce) |
1/2 red onion, thinly sliced (soak in vinaigrette) |
1 bunch watercress, long stems trimmed |
1 large tomato, thinly sliced |