This cool salad is a low-carb addition to Mexican food, and it's much healthier than refried beans covered in cheese.
Combine first 4 ingredients in a jar; cover tightly, and shake vigorously.
Place cucumber, tomato, and avocado in a bowl; add vinegar mixture, and toss gently to coat. Serve immediately.
carbo rating: 4
The Complete Step-by-Step Low Carb Cookbook