To make ahead, prepare through step 2, cover, and chill. Before baking, let bread mixture stand at room temperature 10 minutes while the oven preheats. Then assemble and bake. The cook time will increase by about 10 minutes. Garnish with parsley.
This dish has fewer than 20g of total carbs—about half of what you’ll find in classic bread-based casseroles. Greek yogurt, eggs, and cheese pack a mighty protein punch, while a touch of bacon seasons to perfection.