First of all pick and rinse the dal (green gram) well. Take the washed dal in a pressure cooker and add enough water. Add a pinch of turmeric powder and pressure cook for 4 whistles. Drain and mash the dal well.
Also clean the palak leaves as mentioned above. Drain the water well and chop the leaves.
Heat oil in a pan. Temper with cumin seeds. Add methi leaves and saute. Next add crushed ginger and saute. Now add slit green chilies and dried red chili. Saute well.
Now add peanuts. Peanuts are optional but I recommend. They especially provide a nice crunch to otherwise smooth dal. Saute very well for 2 minutes
Next add chopped spinach leaves and saute well for 3-4 minutes. The spinach leaves should wilt and shrink well. If you especially want a very smooth dal suitable for toddlers you can also puree the spinach and use. As a result we get very smooth dal with soupy consistency.
Once the spinach leaves are well cooked add the cooked lentils. Mix well and add 1 cup water. Season with salt. Cook in medium flame for 5-7 minutes.
Finally add 1/4 teaspoon garam masala powder and mix. Simmer for 2 minutes. You can lemon juice if needed now. Serve palak dal with rice.