Start by rinsing one cup of red lentils in cold water until the water runs clear. Drain thoroughly and set aside.
Heat two tablespoons of oil in a large pot over medium heat. Add the chopped onion and cook, stirring occasionally, until it becomes translucent and soft, about 5 minutes. You should smell a sweet aroma as the onion softens.
Add the minced garlic and grated ginger to the pot. Cook for about 30 seconds until fragrant, stirring constantly. You'll notice a burst of aroma and the mixture will start to sizzle slightly.
Stir in the tablespoon of curry powder and cook for another minute, stirring constantly. The spices will toast slightly, releasing a warm, smoky scent that fills the kitchen.
Add the rinsed lentils to the pot, stirring to coat them with the spices, oil, onion, garlic, and ginger. Pour in three cups of water or broth, then season with a pinch of salt. Bring the mixture to a gentle boil, listening for a steady bubbling sound.
Reduce the heat to low, cover the pot, and let it simmer gently for 15 to 20 minutes. During this time, the lentils will soften and break down, turning into a thick, velvety mash. Stir occasionally to prevent sticking and monitor the consistency.
Check the lentils for doneness— they should be soft and breaking apart, with a rich, smoky aroma. The curry should be thick and velvety, with the flavors melding beautifully. Adjust salt and add a squeeze of lemon juice to brighten the dish.
Remove from heat, garnish with chopped cilantro, and serve hot. Enjoy your comforting bowl of quick red lentil curry with rice or bread for a complete meal.