Pour oil into a large sauté pan over medium heat. Add sausage and cook, stirring, until browned and almost cooked through, 5-7 minutes.
With a slotted spoon, remove sausage to a plate.
Add onions to the pan and cook over medium-low heat, stirring, until browned and softened, 10-12 minutes. Add a few tablespoons of water if the pan gets too dry. Return sausage to the pan.
Add the wine and tomatoes (including juices) and bring to a boil. Immediately reduce to a simmer and cook until liquid has reduced, about 7 minutes. Add spinach. Stir until wilted, about 5 minutes.
Add a bottle of LEMON BUTTER GARLIC SAUCE and stir to combine. Season with salt and pepper.
Return to a boil and add prawns. Cook until prawns are pinks and cooked through, 5-7 minutes.
Serve with lemon wedges over rice, potatoes or pasta.