1 medium onion, chopped
2 cups cubed red potatoes (1/4-inch pieces)
1 cup chopped celery
1 cup chopped carrots
1 cup dried lentils, rinsed
1/2 cup medium pearl barley
8 cups water
2 teaspoons beef bouillon granules
1/2 teaspoon lemon-pepper seasoning
2 cans (14-1/2 ounces each) stewed tomatoes, coarsely chopped
1 teaspoon salt