In a large pot of boiling water, bring lentils to a boil. Simmer until they are tender and their shape remains (about 12 minutes). Drain lentils and let them cool to room temperature. In a food processor, puree together the lentils, tahini, lemon juice, oil and salt and pepper until smooth. Stir in garlic and parsley. Refrigerate and enjoy. Makes 2 ¼ cups.