Print Caramelized Leek and Onion Mac Cheese Author: Lulu Recipe type: Main Prep time:  1 hour 30 mins Cook time:  45 mins Total time:  2 hours 15 mins Serves: 6-7   Ingredients ½ large sweet onion, sliced thin 1 leek, sliced thin 2 tbsp butter or olive oil 3 oz chopped ham 2 cloves garlic, minced 3 tbsp…