Cut fish into 4 (two per serving), and place fillets in a 9 x 13-inch baking pan.
Melt butter in a small bowl in the microwave for 10-20 seconds.
Brush the top of each fillet with butter, squeeze little lemon juice on the fish, then sprinkle the spice blend evenly over the top of each fillet.
Arrange 2 to 3 tomato slices over top of each fillet.
Sprinkle grated parmesan cheese over each tomato slice.
Each slice should be about half covered.
Bake the fish, uncovered, for 8 minutes, then turn oven to a high broil and continue to cook for 6 to 8 minutes, or until cheese on tomatoes begins to brown.
Serve two pieces of fish per serving with rice on the side.