Make the Dough
In a bowl, mix starter, warm water, sugar, yeast (if using), and salt. Add flour and stir until a shaggy dough forms. Turn out and knead 5–7 minutes until soft and smooth (slightly tacky is perfect).

First Rise
Place dough in a lightly greased bowl, cover, and let rise in a warm spot 1–2 hours, until puffy (not necessarily doubled).

Shape
Preheat oven to 425°F (220°C). Line a baking sheet with parchment. Divide dough into 4 pieces; roll each into a ¾-inch rope. Cut into 1-inch bites.

Boil
Bring water and baking soda to a gentle boil. Working in batches, boil bites 20–30 seconds. Remove with a slotted spoon and place on the baking sheet.

Butter & Salt
Brush bites with melted butter and sprinkle with coarse salt while still damp.

Bake
Bake 12–15 minutes, rotating once, until deep golden brown. Cool briefly and serve warm.