Place lentils in a strainer and rinse well under running water.
Add lentils to a jar or bowl and cover with about 3 cups of water. Soak for 8–12 hours (or overnight).
Drain the soaking water and rinse the lentils thoroughly.
Cover the jar with a thin cloth, cheesecloth, or a sprouting lid. Then place the jar upside down at a slight angle in a bowl so excess water can drain and air can circulate. Leave at room temperature.
Rinse and drain the lentils 2 times per day, morning and evening.
In 24–48 hours, small white “tails” will appear. Once they reach your preferred length, your sprouted lentils are ready to eat.
Optional safety step (recommended): To reduce the risk of harmful bacteria, especially for children, pregnant women, or immunocompromised people. Drop the sprouts into boiling water for 1–2 minutes. Optional: Transfer to ice water, or rinse in cold water to keep them crisp. Drain and dry thoroughly.
Dry sprouts well, then store them in the refrigerator wrapped in a clean towel. Use within 5 days.