Preheat oven to 400�F. Place four 30 cm squares of aluminum foil on work surface. Place 1 halibut steak on center of each piece of foil. Top with tomato slices,olives, capers, garlic and parsley, in that order. Sprinkle with salt and pepper; drizzle with oil. Double fold foil to seal packets and place on baking sheet. Bake for 15 minutes. Check halibut in one packet; fish should be opaque throughout and firm to the touch. Serve at once with lemon wedges. 337 calories per serving.