Slightly adapted from Cal Peternell's Twelve Recipes I know it's fussy to call for a.) a specific lentil and b.) two different types of lentils, but I love how the green petite French lentils hold their shape while the red lentils (or brown or yellow) dissolve into mush. Also, only once have I made this when I actually had all of the proper spices: whole cumin, coriander, and fennel, etc. I've used ground cumin. I've made it without fennel. I've used curry powder in place of the turmeric, and each time it was delicious. So, feel free to improvise. I will say, however, that it tasted so good when I ground ALL of the whole spices fresh as suggested. Finally, in the book, Peternell says that often dal is served with a "sizzle," which is a mixture of melted butter, garlic, and a pinch more each of the spices used in the dal sizzled together for 30 seconds and spooned over the dal. I've yet to make the sizzle, nor have I served this with cilantro or yogurt, all of which sound like delicious additions.
3 tablespoons olive oil
1 medium yellow onion, diced
1 teaspoon salt, plus more to taste
1 tablespoon crushed whole cumin seeds
1 tablespoon crushed whole coriander seeds
1 teaspoon crushed whole fennel seeds
1/2 teaspoon crushed red pepper flakes
1 tablespoon ground turmeric
1 cup French green lentils (see notes above)
1/2 cup brown, yellow or red lentils
yogurt, for serving, optional
Heat a soup pot over high heat. Add the oil and then the onions and salt. Stir, turn the heat to low, and cover the pot. Check and stir after a few minutes, letting the moisture on the lid drip back into the pot to keep things steamy. Lower the heat if there is any browning going on, and re-cover. Cook like this until the onion is tender, about 15 minutes.
Add the cumin, coriander, fennel and red pepper flakes and cook, stirring, for 1 minute to toast the spices. Add the turmeric and stir for 30 seconds more. Add the lentils and 4 cups water and bring to a boil. Lower the heat to a simmer and cook, stirring occasionally, until the lentils give up their earthly bodies and become one with your dinner, about 30 minutes. Taste, and adjust seasoning as necessary. I've been adding at least another 1/2 teaspoon of salt as well as at least a cup (maybe 2) more of water to the pot as needed while it is simmering. If you are using the French lentils, it may take as long as one hour for the lentils to cook through.
Recipe by Alexandra's Kitchen at https://alexandracooks.com/2016/01/22/two-lentil-dal/