Macaroni and Cheese with Ham

Heat olive oil in a large saucepan over medium heat. Add onions and cook about 4 minutes, stirring frequently, until tender. Whisk in milk, cream and thyme. Simmer sauce about 30 minutes until reduced to 2 1/2 cups. Reduce heat lo low and stir in Cheddar and Parmesan. Cook, stirring, until cheeses are melted. Meanwhile, cook pasta in a large saucepan of boiling, lightly salted water until just tender. Drain pasta well. Transfer pasta to a large bowl. Add sauce, ham and parsley and toss to blend. Serve warm.