Add oil to a large pot over medium heat. Add onion and sauté until fragrant and translucent, about 2-3 minutes.
Add ginger and garlic. Cook for 1-2 minutes.
Add red curry paste, curry powder and turmeric. Combine well. It's okay if spices stick to the bottom of the pot.
Add potato, carrots, coconut milk, water and broth. Stir well, and then bring to a boil.
Once it starts boiling, reduce to a simmer and add the lentils and rice. Stir well and cook uncovered until everything is cooked through, about 15-20 minutes.
Season with salt and pepper. If the consistency is thicker than you like, you can add more liquid (water or broth).
Optional: add a cup of fresh or frozen chopped kale or spinach
Garnish with a dollop of plain yogurt or non-dairy yogurt (optional) and some coriander.