Boil pasta according to the instructions given on the package or follow following instructions; take 4-5 cups water in deep sauce pan, bring it to boil over medium flame. When it start boiling, add 3/4 cup pasta and 1/2 tsp salt.

Boil then until cooked but not very soft. It will take around 10-12 minutes. To check whether pasta is cooked or not, take one pasta in a fork and bite it. If it is little firm to bite, it is cooked. If it is too hard to bite, it requires more cooking.

Transfer cooked pasta to a large colander and drain excess water.

While pasta is cooking, heat 1/2 tsp oil is a pan Or kadai over high flame. Add 1/4 cup chopped capsicum, 1/4 cup onion, and salt.

Stir and cook until veggies are little cooked but still crunchy, for around 2-3 minutes. Turn off the flame and transfer them to a plate.

Stir continuously and cook for a minute.

Stir and mix for 1-2 minutes.

Reduce flame to low. Continue stirring and cooking until mixture starts to thicken. It will take around 3-4 minutes depending on the size and thickness of the pan. When mixture starts to coat the back of a spoon as shown in the picture here, it means that it has started to thicken.

Add 1/4 tsp oregano, 1/4 tsp red chilli flakes, a pinch of black pepper powder and salt.

Mix well.

Add sauteed vegetables and pasta.

Turn off the the flame. Mix well.

Transfer it to a serving plate. White sauce pasta is now ready. Serve while they are still hot.