Doughnuts: Mix all ingredients with electric mixer fitted with paddle attachment about 4 min. or until a dough forms. Dough will be slightly sticky with a slight bounce. Transfer to surface lightly dusted with rice flour.
Dust dough with additional rice flour and shape into 3-inch-thick rectangle. Divide into 3 even pieces, then roll each piece into a log. Cut each log into 24 (3/4-oz.) pieces. Roll each piece into a ball.
Fry dough balls in 350°F fryer 3 to 4 min. or until light golden brown. Drain. Cool 4 min. on wire rack.
Filling, Glaze and Topping: Meanwhile, combine ingredients for Filling, Glaze and Topping in 3 separate bowls.
Make a small hole in each donut and fill with 1/2 tsp. Filling. Dip opposite side of donut into Glaze and sprinkle with 1/2 tsp. Topping. Place on wire rack until Glaze is firm. Repeat with remaining ingredients. Plate 3 donuts per serving.