In a small bowl, whisk together lime juice, olive oil and melted butter with a dash of seasoned salt. Stir in the shallots, garlic and capers.
In a separate small bowl, mix together the seasoned salt, pepper, cumin and garlic powder. Spice fish fillets each on both sides.
Place the fish fillets on a lightly-oiled large baking pan or dish. Cover with the buttery lime mixture you prepared earlier. Now arrange the green onion halves and lime slices on top.
Bake in 375 degrees F-heated oven for 10-15 minutes. Do not overcook.
Remove the fish fillets from the oven and garnish with the chopped fresh dill.