Heat the olive oil, in a large saucepan over medium to low heat. Add the onion and sauté for 5 minutes, until translucent.

Add the ground beef and cook over medium-low heat, breaking it up with a wooden spoon, for 10 to 12-minutes, or until cooked. Stir in salt and pepper.

Remove from heat. Serve over cooked and drained pasta or use to make lasagna. Allow to cool and refrigerate for up to five days, or freeze in resealable plastic bags for up to three months.