Add oil to medium-size saucepan over medium-high heat. Add onion and saute until transparent. About 5 minutes.
Add tomato sauce and spices. Mix well and simmer over medium-low heat.
Simmer for at least 10 minutes if being used in casserole or 30 minutes otherwise
Use a good brand name tomato sauce. I like Hunts.
Do not use more onion.
Use a non-reactive pan with a lid. Usually, that means non-stick.
Good refrigerated for 3-4 days and maybe frozen for 3-4 months.
Make it Perfect First Time and Every TimeDon't miss out, check the full post. Almost every recipe includes easy step by step photo instructions so you can visualize yourself cooking this recipe along with helpful tips and options.