Cook the Simply Potatoes® Traditional Mashed Potatoes according to package directions. Add in 1 cup of the four cheese Italian blend shredded cheese, 3 tablespoons of the Alfredo sauce, 1/2 cup of the red bell peppers and bacon; stir gently to combine. Set aside.
Meanwhile, heat a large skillet to medium; add 3 tablespoons of the butter, shallots and garlic to the pan and cook, stirring often until shallots and garlic are just tender, not browned (turn fire down if cooking too quickly). Add the flour and cook, stirring constantly for 1 minute. Add the spinach, 1 cup of Alfredo sauce, 1/2 cup chicken broth, nutmeg and sea salt and cracked black pepper to taste. Stir to combine; reduce heat to low and let simmer, stirring on occasion.
Meanwhile, coat a baking sheet with olive oil cooking spray. Preheat the oven to broil and set oven rack in mid-way position. Season the salmon filets with the sea salt and cracked black pepper to taste. Heat another large skillet to medium heat, add the remaining 3 tablespoons of butter to pan and let melt and then add the salmon filets and cook until golden brown on one side; about 5-7 minutes. Turn salmon and cook for 3 minutes more, until almost cooked through.
Remove the salmon filets to a baking sheet. Divide the potato mixture into 4 portions and mound the potatoes on top of each filet and pat down to make uniform. Divide the remaining cheese between each potato crusted salmon filet and sprinkle on top of potatoes. Broil the potato crusted salmon filets until the potatoes and cheese are bubbly and golden; about 3-5 minutes.
While the fish is in the oven, heat a small pan on low heat. Add the heavy cream and chicken broth into the jar of roasted garlic Alfredo sauce; shake well and add to pan to warm through.
To serve, ladle 1/4 of the spinach mixture on top of each of 4 plates. Top each plate with the potato crusted salmon filets and drizzle the cream sauce on top of potatoes and around the plate. Sprinkle with the reserved red peppers and bacon.