Heat the oil in a medium pot over moderate heat. Saute the onions with the salt and pepper until golden, about 10 minutes. Stir in the garlic and lentils and cook 2 minutes, stirring frequently. Pour in the water, bring to a boil, reduce to a simmer and cook, covered, 45 minutes. Stir in the pineapple, remove from the heat and serve.
c.1997, M.S. Milliken & S. Feniger, all rights reserved