2 large onions, sliced about 2/3-inch thick |
2 tablespoons olive oil |
1 cup red wine vinegar |
1/3 cup plus 1 tablespoon (packed) dark brown sugar |
10 garlic cloves, peeled |
1/4 cup capers with their brine |
1/4 cup hot red pepper sauce |
1 tablespoon home spice mix, recipe follows |
3/4 teaspoon mild paprika |
3/4 teaspoon ground cinnamon |
3/4 teaspoon ground allspice |
3/4 teaspoon ground ginger |
3/4 teaspoon dried oregano |
3/4 teaspoon freshly ground black pepper |
3/4 teaspoon ground cardamom |
3 (28-ounce) cans whole tomatoes |
2 (12-ounce) cans tomato paste |
kosher salt and freshly ground black pepper |
1/3 cup cumin seeds |
1/3 cup coriander seeds |
1/3 yellow mustard seeds |