Rhubarb Ketchup

Ingredients (9)

• 4 cups diced fresh or frozen rhubarb
• 3 medium onions, chopped
• 1 can (28 ounces) diced tomatoes, undrained
• 1 cup sugar
• 1 cup packed brown sugar
• 1 cup white vinegar
• 2 teaspoons salt
• 1 teaspoon ground cinnamon
• 1 tablespoon pickling spice