Chicken Marsala without vermicelli potatoes

1 cup uncooked white rice 2 cups water 1 cup all-purpose flour salt to taste ground black pepper to taste 1 pinch dried oregano to taste 1 pound skinless,[...]

3/4 cup butter, divided 2 tablespoons vegetable oil, divided 4 portobello mushroom caps, sliced 1 clove garlic, chopped 3/4 cup all-purpose flour, divided 1[...]