Using a 10-inch, heavy bottomed pan, place the bread in the dish.
Add prepared bacon over bread. Layer with cheddar cheese, chopped onion, and tomato. Have fun with the design of your strata and add whatever you like: ham and asparagus, mushroom and brie, maybe even wild rice! Carol says to "play!"
Prepare the strata base by whisky eggs well. Add sour cream to the whisked eggs, then mayonnaise, then broth. Blend well using an electric whip, or vigorously whip by hand. Pour the strata base over the mixture in the dish.
Bake in a 350 degree oven for 45 minutes to an hour, or until the center of the strata is set. Remove and garnish with more cheese, tomatoes, and onion.