Whole-Grain Breakfast Porridge

1/2 cup red or wild rice

1/2 cup steel-cut oats

1/4 cup pearl barley or farro

1/2 cup farina or wheat cereal

1 2-inch piece orange peel

1 cinnamon stick

1 to 2 tablespoons packed dark or light brown sugar

1/4 teaspoon salt

1/4 cup dried fruit (cranberries, cherries, raisins and/or chopped apricots)

Chopped nuts, maple syrup and/or milk, for serving (optional)