Marinate the salmon: In a large bowl, toss the salmon pieces with the olive oil, salt, pepper, garlic powder and monk fruit sweetener. Set it aside to marinate.
Steam the crab legs: Fill the bottom of a large pot with 1-2 inches of water. Bring it to a boil over high heat, then reduce to medium-high. Set a steamer basket inside and add the crab legs to the steamer basket. Cover and steam the crab legs for 6-7 minutes. Remove and set on a plate, covered with foil to keep warm.
Pan-fry the halibut cheeks: Pat dry the halibut cheeks with a paper towel. Season with salt and pepper. Heat 1 tablespoon of olive oil in a large skillet over medium heat. Add the butter and capers and cook them for about 1 minute. Place the the halibut cheeks in the skillet and cook for 3-4 minutes per side. The halibut is done when it is opaque and firm. Drizzle 1 tablespoon lemon juice to the halibut. Transfer the halibut to a plate and cover with foil. Spoon the remaining butter/caper/lemon juice pan sauces into a separate small bowl.
Sauté the shrimp: Wipe out the pan with a paper towel. Add 2 tablespoons of olive oil, butter and minced shallot. Sauté for 30 seconds. Add the minced garlic to the pan and cook another 30 seconds. Add the spot shrimp to the skillet and cook about 90 seconds to 2 minutes per side or until the shrimp are opaque. Transfer the shrimp to a small serving bowl and spoon the buttery pan sauce (with garlic and shallots) on top.
Broil the salmon bites: Preheat the oven broiler. Spread the marinated salmon pieces onto a large baking sheet lined with aluminum foil. Set about 4 inches under the broiler and broil the salmon for 5 minutes. Flip the salmon pieces and return to the broiler for another 4-5 minutes.
Assemble the seafood board: Assemble all of the cooked seafood on a large serving board. Add the pan sauces and other sauces of choice to the board in small ramekins. Garnish with lots of lemon wedges, fresh parsley/rosemary, and favorite charcuterie items like olives, capers or other pickled vegetables.