In a big bowl take whole wheat flour, maida. Add salt, lemon juice, and oil (keep 1 tsp oil aside for smoothening the dough).
Mix well .
Add spinach puree to it and mix well.
Knead into a stiff dough like paratha.
Add 1 tsp oil and smoothen the dough. Cover the dough with a wet cloth and keep the dough aside. In the meanwhile prepare the stuffing.
In the pan add two tsp oil, add cumin seed and fry. Once the cumin seed crackles, add ginger chili paste and saute.
Add the chopped onions and saute till the onions become translucent.
Add turmeric, coriander and cumin powder, red chili powder, dry mango powder and garam masala. Mix well and saute for a minute.
now Add the boiled peas and mix well.
now Add the chopped paneer cubes and salt.
Mix well and add chopped coriander leaves.
. The stuffing is ready. Keep it aside and let it cool.
now take dough and Make equal balls from the kneaded dough. Take one ball, flatten it and dust it with flour.
Roll the dough into a circle . Cut the circle into half.
Take one part and make a cone from it by bringing both the edges together. Seal the edges by applying water.
Put the prepared filling in the cone Apply water on the upper edges and seal it.
The samosa is stuffed.
Similarly, prepare the remaining samosas.

Put the samosa on the baking paper. Apply oil on it. Bake the samosa in the preheated oven at 200 C for 25-30 minutes or till crispy.
The baked palak paneer samosa is now ready to serve.