Heat olive oil in a large skillet over medium-high heat.

Add chopped onion and sauté until tender, about 4 minutes.

Add minced garlic and sauté for another minute or two, being careful not to burn it.

Add chopped sun-dried tomatoes, sugar, salt, pepper, chopped plum tomatoes, and diced tomatoes.

Reduce heat to medium-low and simmer for 20 minutes, stirring frequently, until the sauce reduces.

While the sauce is simmering, prepare the penne pasta according to package directions.

Drain the cooked pasta.

Return the drained pasta to the pot.

Add the tomato sauce, mozzarella cheese (or goat cheese), parsley, and basil (if using) to the pot.

Mix lightly to combine.

Serve immediately.