Preheat your oven to 200°C (390°F). Prepare a baking sheet by lining it with parchment paper for easy cleanup.
Rinse the dried lentils under cold water to remove any debris, then thoroughly pat them dry with a clean towel or paper towel to remove excess moisture.
In a mixing bowl, toss the dried lentils with a tablespoon of olive oil until they are lightly coated. This helps the spices adhere and promotes crisping.
Add the smoked paprika and a pinch of sea salt to the bowl. Toss everything together until the lentils are evenly coated with the spice mixture.
Spread the coated lentils in a single layer on the prepared baking sheet, ensuring they are not overcrowded to allow for even roasting.
Place the baking sheet in the oven and roast for 20-25 minutes, shaking the pan every 7-8 minutes to turn the lentils and promote even crisping.
Check the lentils at the 20-minute mark; they should be golden, fragrant, and crispy, with a crackling sound when shaken. If needed, roast for an additional 3-5 minutes, watching carefully to prevent burning.
Remove the lentils from the oven and let them cool on the baking sheet for about 5 minutes. This resting period helps them crisp up further.
Taste the lentils and adjust the salt if necessary. For a bright flavor, squeeze a little fresh lemon juice over them and toss gently.
Transfer the crispy roasted lentils to a bowl or serve directly from the baking sheet. Enjoy immediately for the best crunch or store in an airtight container for up to a week.