Dry the scallops and shrimp really well with paper towel. Season with salt and pepper.
Heat 2 tablespoon of avocado or grapeseed oil in a large skillet over medium-high heat.
Add scallops to hot pan and cook for 1-2 minutes per side, depending on size. Transfer to a plate.
Add shrimp to the pan and cook for 1 minute per side. Transfer to the same plate as the scallops. Lower heat to medium-low.
Add shallots and cook, stirring constantly, for 2-3 minutes or until softened and glassy. Add garlic and chili flakes and continue cooking and stirring until the garlic is fragrant. About 1 minute.
Add white wine and bring to a boil. Scrape all the brown bits from the bottom of the pan. This adds extra flavour to the dish. Simmer until reduced by half. Approximately 2 minutes.
Add cream and sun dried tomatoes. Simmer until the cream starts to reduce and thicken. 2-3 minutes.
Add spinach and parmesan cheese. Stir until spinach is wilted. Taste and add salt and pepper as necessary.
Return scallops and shrimp to the pan and stir to combine and warm the seafood.
Serve immediately topped with extra parmesan cheese and fresh parsley (optional)