Preheat the oven to 375 degrees F. Peel and dice your potato. Add to an oiled pan and stir occasionally for about 10 min.
Chop the onion and leeks into thin half moons and thinly chop the garlic. Add to the pan of potatoes with the green peas and cook for about 5 minutes stirring occasionally. Everything should be softened but not overly soggy. Remove from heat.
While the veggies are cooking, add the remaining ingredients to the blender - silken tofu, high protein tofu, nutritional yeast, salt, pepper, turmeric, mustard, and kala namak - and blend until smooth.
When veggies have been removed from heat and have slightly cooled, pour in the tofu mixture. Stir to evenly distribute the sauce.
Pour mixture into quiche crust and bake for 40 minutes rotating 90 degrees halfway through.
Let cool for about 20 minutes before cutting in.