Homemade Tomato Ketchup Ingredients: 3 tablespoon extra-virgin olive oil 3 medium onion, sliced into half moons 4 garlic cloves, chopped (about 1 tablespoon) 2 celery sticks, chopped 1 sweet red pepper, chopped 4 cm piece of ginger, peeled and chopped ½ teaspoon crushed red pepper flakes ½ teaspoon ground allspice 1 teaspoon cinnamon 1 teaspoon mustard powder 1 teaspoon coriander seeds 6 tablespoons tomato paste 2 kg whole tomatoes; in juice, peeled, chopped 1 cup brown sugar, depending…