Meatballs with Onion "Jam"

Ingredients

• ¾ pound ground beef
• ¾ pound ground chicken (dark meat)
• 1 teaspoon ground Ras El Hanout spice blend
• ¼ teaspoon ground cardamom
• ¼ teaspoon ground cinnamon
• ½ teaspoon ground paprika
• ½ teaspoon ground turmeric
• 1 ½ teaspoons kosher salt
• ½ teaspoon ground black pepper
• ½ teaspoon baking soda
• 1 yellow onion, finely chopped
• 1 bunch fresh parsley, finely chopped
• 1 tablespoon ketchup
• 1 egg
• 2 tablespoons olive oil
• 1 cup semolina flour
• 3 eggs, beaten
• ¼ cup olive oil
• 5 large yellow onions, thinly sliced
• 2 tablespoons brown sugar
• 1 teaspoon kosher salt
• 1 teaspoon ground black pepper
• ¼ cup balsamic vinegar or 1 tablespoon pomegranate concentrate
• ½ cup golden raisins
• 3 tablespoons roasted walnuts, roughly chopped
• 5 sprigs fresh parsley, chopped
• 3 sprigs fresh mint, de-stemmed and chopped