Mediterranean Grape and Lamb Pitas

<i>Photo and recipe: California Table Grape Commission</i>

1 cup canned garbanzo beans, rinsed
1 cup red, green or black seedless grapes, halved
¾ cup crumbled Feta cheese
1/3 cup diced red onions
2 Tbsps. chopped fresh mint
½ tsp. dried oregano
salt and fresh ground black pepper, to taste
6 whole pieces of pita bread
6 leaves, green leaf lettuce, washed and dried
1 lb. cold, cooked lamb, thinly sliced

Tahini Dressing:
1 clove fresh pressed or chopped garlic
2 Tbsps. tahini
1 cup plain yogurt
¼ tsp. ground cumin
pinch of salt
dash of hot sauce (optional)