Reprinted with permission from No Excuses Detox, copyright © 2017 by Megan Gilmore, published by Ten Speed Press, an imprint of Penguin Random House LLC.
MAKE IT AHEAD: You can prepare this dish as a freezer meal by beating together the pizza sauce, eggs, cheese, and salt in a large bowl, then stirring in the raw cauliflower and spinach. Spread the mixture into a 9 by 13-inch oven-safe dish and top with the shredded cheese, then cover and freeze for up to 3 months. To heat, thaw in the fridge overnight, then place the dish in a cold oven. (You don’t want to risk a glass dish shattering from a drastic temperature change.) Turn on the oven to 350°F and bake uncovered until the cheese on top is golden and the eggs in the center of the dish are cooked thoroughly, about 1 hour and 15 minutes.