Bake halibut in 400 degree oven for 7-10 minutes. Once finished, season with salt, pepper and garlic powder. Drizzle with balsamic vinegar and olive oil and place basil on top
Preheat oven to 425 degrees. Whisk together 1 Tbsp. olive oil and lemon juice in small bowl. Add salt and pepper to season. Drizzle half of this dressing onto the halibut and bake for 12 minutes. Add remaining 1 Tbsp. olive oil and garlic to saucepan and sauté on medium heat for 1 minute. Add the spinach. Top baked halibut with spinach mixture and remaining half of dressing.