Add margarine and melt over medium heat. Saut leeks and carrots in margarine until crisp tender and add lemon juice and tarragon. Place 2 pieces of fillet in each. Sprinkle fillets with salt and pepper and top each with vegetable mixture. Seal foil and grill on medium coals for 7 minutes.
Fish is done if it flakes with a fork.
1 teaspoon minced thyme 1 teaspoon pepper Cut zucchini and squash into 1-inch squares. Cut peppers into 1-inch strips. Combine all ingredients in a dish and let marinate 30 minutes. Use a vegetable grilling basket or place foil on the grill, and grill vegetables for 10 to 15 minutes. Spray corn with cooking spray and sprinkle with seasoning.