Pre-heat the oven to 350°F.
Arrange the bread on a baking sheet and bake until lightly toasted. Transfer to a large mixing bowl. Turn off the oven.
Chop the vegetables and heat a large skillet with the EVOO, four turns of the pan, over medium-high heat. Add the garlic, onion, carrot and celery and sweat the veggies for a few minutes. Wilt in the kale or add the spinach. Season with nutmeg, oregano or marjoram, thyme, rosemary, salt and pepper. Cook to tender, 8-10 minutes. Stir in the tomato paste and cook for 1 minute, then add the stock and simmer for 5 minutes over medium-low heat.
Pour the mixture over the bread and add a few handfuls of cheese, about 3/4 cup. Toss to combine, transfer to a baking dish and cool.
Beat the eggs with milk, salt and pepper. Pour the egg mixture over the cooled bread casserole. Cover and chill overnight or for a minimum of a couple of hours.
Pre-heat the oven to 400°F. Top the casserole with a drizzle of EVOO and the remaining cheese. Bake until puffed and golden, 45 minutes.
This is one of many “Yum-o!” recipes – it’s good and good for you. To find out more about Yum-o!, Rachael’s nonprofit organization, go to www.yum-o.org.