A friend works for a food broker, she recently received a 10 lb bag of red lentils and gave me some.
Found this recipe online...it is excellent!
Lentils (Dal):
1 cup masoor dal red lentils, picked through for stones
2 cups water
1 onion, diced
4 cloves garlic, thinly sliced
1 (1/2-inch) piece ginger, peeled and minced
2 medium tomatoes, diced
1 serrano chile, sliced in 1/2, optional
Tempering oil (bagaar):
1/2 teaspoon cumin seeds
1/2 teaspoon black mustard seeds
Generous 1/2 teaspoon turmeric powder
1/2 teaspoon paprika or bafaat powder
1 tablespoon vegetable oil
Handful chopped fresh cilantro leaves
Directions
Put the lentils in a strainer and rinse them under running water. Add
them to a bowl, cover with water and let soak for 30 minutes. Drain
and set aside.
In a medium saucepan, combine 2 cups of water, the onions, garlic,
ginger, tomatoes, chile, if using, and the lentils. Bring to a boil
over medium-high heat. Skim any scum from the surface. DO NOT ADD SALT
YET; it will toughen the lentils, thereby lengthening their cooking
time. Lower the heat, cover the pot with a lid and gently simmer until
the lentils are tender, almost translucent, and almost falling apart,
about 30 to 40 minutes.
Whisk the lentils, releasing its natural starch, and mash some them so
the mixture becomes thick. Add salt, to taste.
Tempering oil (bagaar):
In a small bowl, combine the cumin and mustard seeds. In another
bowl, combine the spice powders.
In a small skillet, over a medium-high flame, warm 1 tablespoon
vegetable oil. Once the oil is shimmering, add seeds and immediately
cover so you don't get covered in spluttering oil! Add the
spices. They should sizzle and bubble a little - that's the blooming
and it's exactly what you want. Don't let them burn. The mixture
should bloom for about 30 seconds, no more.
Pour the oil mixture into the lentils, standing back so you don't get
hurt when the mixture splutters again. Stir to combine. Transfer the
lentils to a serving dish and garnish with cilantro.
Can add splash of fresh lemon juice before serving.
I did add the fresh lemon juice and extra cilantro...because that's how I roll.

Also I substituted a jalapeno since I didn't have a serrano.