Prepare the salmon filets by patting the filets with a paper towel to remove extra moisture moisture. Then, rub the flesh side with the Cajun seasoning and garlic powder.
Prepare the shrimp by patting them dry with a paper towel and adding to a medium size bowl. Add Cajun seasoning and toss to coat the shrimp with the seasoning.
Add oil to a large skillet and heat over medium-high heat until the oil sizzles when drops of water hit it.
Add salmon skin-side down. Sear without moving for 3-4 minutes. Flip and sear for an additional 3-4 minutes on the other side. Remove and place on a plate to rest.
Next, add shrimp to the same skillet and sear for 1 minute. Flip, and sear for an additional 1-2 minutes until the shrimp is opaque. Remove and place in a bowl to rest.
In the same skillet, make the sauce. Reduce the heat to low-medium heat. Add sundried tomatoes and bell peppers. Sauté for 2-3 minutes until the bell peppers start to soften and become fragrant. Add garlic and sauté for 30 seconds. Do not allow the garlic to burn.
Add chicken broth and allow to come to a simmer, frequently stirring and scraping the bottom of the skillet with a wooden spoon to lift any bits that are stuck.
Reduce to low heat, add heavy cream. Allow to come to a gentle simmer, stirring frequently, 4-5 minutes. The sauce should thicken slightly as it simmers. If it becomes to thick, add splashes of chicken broth until it's the consistently you like.
Remove from heat. Add Parmesan cheese, lemon juice and optional hot sauce. Stir to combine.
Place seared shrimp on top of the salmon, then drizzle with the Cajun cream sauce. Serve warm.