Heat oil in a skillet
Add garlic and sauté for a min
Add onion and sauté for a min
Add red pepper flakes and fry for a min
Add tomato and cook until mushy
Add sugar, black pepper, salt, mix well
Add parmesan cheese and mix well
Add cooked penne and mix well, cook for a min along with sauce
Garnish with a basil leaf, Parsley