Tangerine Semifreddo with Salted Almond Brittle
Brittle: 2 tablespoons (1/4 stick) unsalted butter, divided 2 cups sugar 1 cup light corn syrup 1 cup water 1/4 teaspoon salt 2 cups blanched whole almonds, toasted , coarsely chopped 1/2 teaspoon baking soda 1 teaspoon flaked sea salt (such as Read on!