You fry up some bacon and dice it up. Fry onions in the bacon grease and add back the bacon pieces. Then add flour and whisk all that together. Then gradually add cream to it, whisking that around for a few minutes. Then you add a can of whole peeled tomatoes that have been crushed up. I like whole peeled tomatoes the best. They taste better to me. Then add some salt and pepper and sugar and basil, and stir it good and let it simmer for about 20 minutes. You pour this over biscuits. It's pretty good.
I make a bacon grease based roux when I make tomato gravy. But it never sticks.
I heat the bacon grease. Then add flour, and after whisking that around for a few minutes until it thickens, I add cream gradually.
It makes a nice roux.
As we showed still me and lb our compost heap which has maggots in it, which is part of the process, it reminded of us you, fuggs, and we all had a good chuckle.