Step 1

Cook and crumble the ground beef in a large deep sized skillet over medium-high heat. Drain any excess grease, if necessary, and add the onion and garlic to the pan. Continue cooking for an additional 3-4 minutes, until the onion begins to soften.

Step 2

Add the crushed tomatoes, tomato puree, oregano, basil, salt, black pepper, and red pepper flakes to the meat mixture. Stir to combine and bring to a simmer.

Step 3

Reduce heat to maintain a slow simmer and continue cooking, stirring occasionally, for 30-60 minutes until the sauce thickens. Taste the sauce and adjust the seasonings as needed. Sprinkle with fresh parsley and Parmesan before serving, if desired.