Heat oven to 450°F.
Melt the butter in a large skillet and add leeks. Cook, stirring, until leeks are softened, 20-25 minutes. Add the thyme and the wine and cook for another 3 minutes. Add spinach, cover and steam until the spinach is wilted, 5-7 minutes. Stir in LEMON BUTTER GARLIC SAUCE and cream and simmer until warmed through. Season with salt and pepper.
While leeks are cooking, rub both the salmon and the tomatoes with a bit of olive oil, season with salt and pepper and roast until salmon is cooked through, 10-12 minutes.
Tuck salmon and tomatoes into the sauce and serve with crusty garlic toast.