1. Make chutney: Heat 1 tablespoon oil in a small skillet over medium heat. Add onion and mustard seeds; cook, stirring occasionally, until onion is golden, about 8 minutes.

2. Add tomatoes, breaking them up with a spoon. Stir in vinegar, raisins, sugar, and 1/4 cup water; season with salt and pepper. (Yellow raisins, which are plumper and sweeter than dark ones, are often used to make chutneys.) Bring to a boil, and reduce heat; simmer, stirring occasionally, until mixture has thickened, about 15 minutes. Set chutney aside.

3. Meanwhile, generously season both sides of pork chops with salt and pepper. In a large skillet, heat remaining 2 tablespoons oil over medium-high heat. Cook pork (in two batches, if necessary) until browned and cooked through, 3 to 4 minutes per side. Serve with chutney.