Preheat oven to 350°. In a shallow baking pan, toast almonds until golden brown, 5-10 minutes, stirring occasionally. Cool. Pulse chocolate in a food processor until finely ground (do not overprocess); transfer to a bowl. Pulse almonds in food processor until coarsely chopped. Sprinkle 1 cup almonds over bottom of a greased 15x10x1-in. pan. Sprinkle with 1 cup chocolate., In a heavy saucepan, combine butter, sugar and water. Cook over medium heat until a candy thermometer reads 290° (soft-crack stage), stirring occasionally., Immediately pour mixture over almonds and chocolate in pan. Sprinkle with remaining chocolate and almonds. Refrigerate until set; break into pieces.