Because this meal-in-a-dish has a cauliflower base instead of rice, diners avoid a big hit of carbohydrates. Cauliflower “rice” is available in most supermarkets, frozen or bagged in the produce section, or make it yourself by grinding cauliflower into rice-size bits in the food processor. Mexican cotija cheese can be substituted for the feta. This dish can be assembled up to a day before serving, and it keeps well.