In a heavy large pot, heat 2 TB olive oil. Brown ground sausage, stirring and breaking up the meat until cooked through. Transfer to separate bowl and set aside.
In the same large pot, heat 3 TB olive oil. Add garlic and onion, and saute until translucent. Add in bell peppers, 1 tsp salt, and 1 tsp black pepper. Continue to cook another minute. Add browned sausage back to the pot, and stir to combine.
Add 2 jars tomato-based pasta sauce, 1 TB sugar, oregano, and basil. Stir to combine well.
Simmer 20-30 minutes. If needed, add salt and pepper to taste.
*Note: Pasta sauce keeps well in airtight container in fridge for several days. Sauce alone may also be frozen if sealed airtight.