Rinse the urad dal and soak in 2–3 cups water for 5–6 hours with the fenugreek seeds.
Rinse the rice until the water runs clear and soak separately for 5–6 hours.
Drain the dal and grind with 1 1/4 to 1 1/2 cups ice-cold water to a fine paste; transfer to a large container.
Drain the rice and grind with 1 1/2 to 2 cups ice-cold water to a smooth paste, adding only as much water as needed.
Combine ground rice and dal. Add rock salt and mix by hand for 1–2 minutes. The batter should flow freely but not be runny.
Cover and ferment until increased in volume, frothy, and bubbly. In an Instant Pot use the Yogurt setting for about 12–14 hours; otherwise ferment in a warm place.
Use the fermented batter for idli or dosa. For idli, grease idli plates and steam 10–12 minutes on high heat, or about 13 minutes in an Instant Pot with the valve venting.
Notes
Fermentation time varies with ambient temperature. The source suggests about 3 tablespoons poha may optionally be ground with the rice.
Stir the cookie ingredients together until smooth. Scoop 1-inch balls onto a parchment-lined baking sheet.
For the classic shape, form each dough ball into a short log. Roll in sugar if desired, flatten with a fork in a criss-cross pattern, and pinch both sides inward.
Bake 12 minutes, then cool on the tray 1 to 2 minutes before transferring.
For the filling, beat butter and peanut butter until smooth. Slowly beat in powdered sugar, then add milk 1 tablespoon at a time until the desired consistency is reached.
Spread about 1 tablespoon filling on the bottom of one cookie and top with another to make a sandwich.
Combine water, butter, salt, and 1/4 teaspoon cinnamon in a 1 1/2-quart saucepan over medium heat and bring to a rolling boil.
Reduce heat to low. Add flour and stir vigorously until the mixture forms a ball. Remove from heat and rest 5 to 7 minutes.
Add eggs one at a time, stirring until combined.
Heat oil in a medium skillet or 1-quart saucepan to 350°F.
Spoon dough into a piping bag fitted with a large star tip. Pipe 1-inch strips over the pan, cut with a knife, and drop into the hot oil without overcrowding.
Fry until golden brown, remove with a slotted spoon or spider, and drain on paper towels.
Mix sugar with the remaining 1/2 teaspoon cinnamon. Toss warm churro bites in cinnamon sugar and serve with your favorite dipping sauce.
Preheat oven to 375°F. Line a heavy 10 x 15-inch jelly-roll pan with parchment paper.
Beat eggs on high speed until very thick and lemon-colored. Gradually beat in sugar. On low speed, beat in water and vanilla.
Whisk flour, cocoa, baking powder, and salt together. Gradually add to the egg mixture, beating just until smooth.
Spread batter evenly in the prepared pan and bake 12 to 15 minutes, until the top springs back when touched and a toothpick comes out clean.
Immediately loosen and lift the cake from the pan using the parchment. While hot, roll the cake from the short end using the parchment and let cool completely, at least 30 minutes.
Whip cream, vanilla, and powdered sugar to soft peaks.
Gently unroll the cooled cake, spread filling evenly over it, then roll it back up without the parchment. Wrap seam-side down in plastic wrap and refrigerate at least 1 hour.
Dust with powdered sugar before serving, if desired.