Cook pasta al dente, rinse under cold water and set side. keep the cooked pasta covered.
Rinse, clean and roughly chop the spinach leaves.
Bring a big pot of water to rolling boil. Add spinach leaves and blanch for 2 minutes.
Drain and immediately rinse the leaves in cold water and blend to a smooth puree.
Heat butter in a thick pan. Add minced garlic cloves and saute well.
Next add chopped onions and saute till the soften a bit.
Now add the chopped veggies and saute for 3-4 minutes.
Once the veggies turn a bit soft, add the spinach puree and coat well. Cook for 2-3 minutes.
Add cold milk slowly and mix very well in low flame.
Simmer and let the sauce thicken. Season with salt and pepper powder.
Add the cooked pasta and mix. Simmer for a minute.
Finally add pasta seasoning and mix well. Serve pasta in spinach sauce warm.