How to Cook the Pasta
In a large pan, add 6-7 cups of water and 1 teaspoon salt. Bring it to a boil.
Add 2 cups of penne pasta in boiling water.
Boil and cook the pasta on medium flame.
When pasta is cooked to an al dente texture (cooked but little firm), switch off the flame.
Drain off the pasta using a colander and keep aside.

How to Cook Vegetables
In another pan, heat 2 tablespoon oil and add 1 ruffly chopped onion.
When the onion looks translucent, add 3-4 chopped garlic cloves. Saute for a minute.
Further, add 1 medium-sized chopped capsicum, ¼ cup sweet corn, and ¼ cup.
Sauté vegetables on medium flame until cooked but slightly raw.
Switch off the flame and keep the vegetables aside.

How to Make White Sauce
Heat the pan with 2 tablespoon butter.
When butter melts, add 2 ½ tablespoon of all-purpose flour.
Sauté until aromatic on low flame.
Further, add 1 ½ cup milk and start stirring the milk.
Continuously stir the milk and flour, so that no lumps are formed.
The sauce should be semi-thick. If your sauce looks too thick, add ½ cup more milk to it.

Now add ¼ teaspoon black pepper powder,
1 teaspoon chilli flakes, and 1 teaspoon oregano.
Mix all the ingredients very well.

How to Make White Sauce Pasta
Add cooked pasta and vegetables in white sauce.
Gently mix the pasta and vegetables with white sauce. Make sure you coat the pasta with the white sauce very well.
If the sauce looks a little thick, add ¼ cup boiled pasta water and mix gently
Lastly, add 3-4 tablespoon grated cheese and mix very well.
Switch off the flame and the white sauce pasta is ready.
Serve white sauce pasta hot with grated cheese on top.