1 lb parsnips, peeled and cut into 1/2 inch cubes
olive oil
1 small yellow onion, thinly sliced
2 cloves garlic, minced
1 tbsp fresh thyme leaves (or 1 tsp dried)
6 cups of day old bread, cut into 1 inch cubs
4 eggs
1 1/2 cups whole milk
1 cup heavy cream
1 cup grated sharp white cheddar
1/4 cup grated parmesan
1 tbsp dijon mustard