Melt the butter in the microwave or a skillet and then transfer it to a mixing bowl.
Add soy sauce, lemon juice, Worcestershire sauce, curry powder, salt, black pepper, minced fresh basil, and dried thyme in the butter. Combine them all very well to make the salmon marinade.
Then pour this marinade mixture into an airtight storage container. Add the salmon fillets only by one in the marinade. Toss them well in the marinade to coat the mixture handsomely all over the fillets.
Place the container in the refrigerator for half an hour. During this period, continue turning the fillets upside down and changing their positions in the marinade from time to time. It will allow the flavors and seasonings to incorporate well in the salon everywhere.
Meanwhile, prepare the yummy and rich tartar sauce. In a small bowl, mix mayonnaise, ground mustard, dried dill, paprika, pepper, chopped green onion, and lemon juice. Turn all these ingredients into a velvety and flavorful sauce. Airtight the bowl and store the sauce in the refrigerator.
When the salmon is marinated fully, take it out of the refrigerator. Drain excess marinade to avoid burning during the grilling process.
Pour a small amount of cooking oil on a paper towel. Lightly go over the grill rack by holding the paper towel with thongs. Heat the grill to 450 degrees Fahrenheit. Then place the marinated salmon fillet on the heated and oiled grill. Keep the skiing side of the salmon down.
Place the cover on the grill. Set its temperature to moderate to avoid burning the salmon. Grill for 9-10 minutes or until the desired degree of doneness has been achieved. One good indicator is the crispy and golden brown of salmon with a soft inside.
Grill all the fillets in the same manner. Dish them out. Drizzle the tartar sauce on them. You can also simply serve it as a dipping sauce. Mouth-watering Texas roadhouse grilled salmon is ready. Bon Appetit!