1 pound salmon,orange roughy or other fish fillets1 tablespoon olive oil1 teaspoon basil1 teaspoon minced garlic1 tablespoon pine nuts, crushed2 tablespoons plain or lemon yogurt or low fat sour cream1/2 cup shredded carrots1/4 cup chopped onion or shallots4 thick tomato slices1 tablespoon lemon juice