Step 1

In a large skillet, heat the oil over medium heat.  To the oil, add the onion and cook for 3 minutes.

Step 2

Add the garlic, basil, red pepper flakes, salt, sugar, and butter, then stir to combine.  Simmer for 2 minutes.

Step 3

Add the crushed tomatoes and water, stir well, and reduce heat to low.  Simmer for 25 minutes.

Step 4

Serve over your favorite pasta or allow the sauce to cool and store until later.