Heat oven to 400 degrees. Heat oil in a 10 inch cast iron skillet on medium high. Add onion; cook til softened. Add sausage; cook breaking up with a fork til done. Drain, if needeed. Add cream; simmer 5 minutes.
Add tomatoes, sage , and red pepper. Simmer on medium about 10 minutes, or til sauce thickens.
In a medium bowl,combine cornbread crust ingredients; mix well. Spread over top of sausage mixture in skillet. bake at 400 degrees for 15-20 minutes or til golden brown.
In a bowl, toss greens, and dressing. Cut cornbread crust into 6 wedges.
Place each with sausage filling on plate;top with 1/6th of the greens.