Simple Whitefish With Lemon and Herbs

4 white fish fillets, about 1 1/2 lbs total (cod, halibut, etc.--I used haddock)
4 cloves garlic, minced
1 teaspoon dried rosemary or 4 teaspoons fresh rosemary leaves, crushed
1/4 teaspoon white pepper or 1/4 teaspoon black pepper
1/4 teaspoon salt
1 tablespoon olive oil
1 large lemon, thinly sliced,seeded,end pieces discarded

1 Preheat oven to 450 F and place a heavy baking sheet in oven to preheat as well.
2 Cut 4 large rectangles of foil or parchment paper and place a fish fillet in the center of each piece.
3 Combine remaining ingredients except lemon slices in a small bowl and stir well.
4 Spread mixture evenly over fish, scatter lemon slices on top, and fold the edges of the foil or paper up over each fillet, crimping edges tightly.
5 Place packaged fish on preheated baking sheet and bake 13-15 minutes, until fish is just cooked through.
6 Serve fish in packages.