Curried Cashew Burgers

Name: Curried Cashew Burgers
Ingredients: This recipe calls for:; 6 6-inch whole-wheat pita breads; 1 clove garlic, minced; 1 cup diced peeled carrots, (2-4 medium); 1 cup chopped onion, (1 medium); 1/2 cup red lentils, rinsed (see Ingredient note); 2 cups plus 2 tablespoons water, divided; 3/4 teaspoon salt, divided; 2 teaspoons curry powder; Cucumber-Mint Raita; Freshly ground pepper, to taste; 3/4 cup fine dry breadcrumbs; 1/2 cup Cucumber-Mint Raita, optional (recipe follows); 6 teaspoons extra-virgin olive oil, divided; Lettuce & sliced cucumber, for garnish; 3/4 cup raw cashews