01 - Blend strawberries, coconut milk, maple syrup, vanilla extract, and salt until smooth. Churn in an ice cream maker according to manufacturer's instructions, or pour into a shallow dish and freeze, stirring every 30 minutes until creamy and scoopable (about 2–3 hours). Scoop into 8 small balls (about 1 1/2 tablespoons each), place on a lined tray, and freeze until firm (at least 2 hours).
02 - In a microwave-safe bowl, whisk sweet rice flour, sugar, water, and beetroot powder (if using) until smooth. Cover loosely with plastic wrap. Microwave on high for 1 minute, stir, then microwave for another minute. Stir again, then microwave in 30-second intervals until the dough is thick and translucent (total about 2.5–3 minutes). Allow to cool until safe to handle (about 10 minutes).
03 - Generously dust a clean work surface with potato starch. Turn out the mochi dough onto the starch, dust the top, and roll to about 1/4-inch thickness. Cut 8 circles (about 3.5 inches in diameter) using a round cutter or glass. Keep mochi circles separated with parchment to prevent sticking.
04 - Working quickly, place a frozen ice cream ball in the center of a mochi circle. Pinch edges together to seal; place seam-side down in a cupcake liner. Repeat with remaining mochi and ice cream. Freeze finished mochi ice cream at least 1 hour before serving.