Casseroles need not contain eggs or dairy products. And baked beans, exceptionally creamy after their long simmer in the oven, can be made into perfect vegan fare. Add vegetables of your choice and you’ll have a perfect one-dish meal. This savory gratin is a regular item in my winter repertory. Those one-pound bags of sturdy greens, sold in my market as “Southern greens mix,” are a winter godsend. All the time-consuming work has been done, and the rest can be accomplished while the blanching water comes to a boil.
Heat the olive oil over medium heat in a large nonstick skillet, and add the shallots or onion. Cook, stirring, until tender, three to five minutes. Add the mushrooms, and cook, stirring often, until tender, about eight minutes. Add salt and pepper to taste, and the rosemary and garlic. Cook for another minute. Add the greens, and stir together for another minute. Adjust seasonings.
04Whisk together the eggs and milk. Add salt and pepper, and stir in the cheeses and mushroom/greens mixture. Scrape into the baking dish. Bake 35 to 40 minutes until browned and sizzling. Serve hot, warm or room temperature.