How to Make It
Preheat oven to 425°F. Toss tomatoes, Peppadews, onion, and oil in a 13-by-9-inch baking dish. Season with ½ teaspoon salt and ¼ teaspoon pepper.
Roast until tomatoes begin to burst and onions are softened, 18 to 20 minutes; remove from oven. Reduce oven to 275°F.
Stir together caraway, coriander, cumin, and remaining ½ teaspoon salt and ¼ teaspoon pepper in a small bowl. Season flesh side of salmon with spices.
Push vegetables to sides of baking dish. Nestle salmon, skin side down, in dish. Spoon some vegetables and oil over salmon.
Return to oven and bake until salmon is opaque, 15 to 20 minutes. Drizzle everything with vinegar and top with mint.