Leafy Avocado and Leek Salad

2 tbsp extra virgin olive oil
1 tbsp grated lime or lemon zest
2 tbsp lime or lemon juice
1/4 tsp each salt and pepper
6 cups chopped leaf lettuce
1 avocado, peeled and cubed
2/3 cup leef sliced thinly

In a salad bowl, whisk oil, lime zest and juice, salt and pepper.
Add lettuce, avocado and leeks.
Toss to coat.

Makes 4 servings.