Lotus Shaking Beef

Ingredients

• 1/2 lb beef sirloin steak, cubed into 1-inch cubes
• 5 garlic cloves, chopped
• 1 teaspoon fish sauce
• 1/2 teaspoon sugar
• 2 teaspoons canola oil
• 1 medium onion
• 1 tablespoon vinegar
• black pepper
• 1 tablespoon olive oil
• 2 cups watercress (I used spring mix instead and usually use more salad)
• 1 teaspoon canola oil
• 1/2 cucumber, sliced thinly