In a large pot, heat the oil or bacon grease over medium heat.
Add the sausage and cook until lightly browned.
Add the onion and bell pepper and sauté until tender.
Stir in the garlic and Cajun seasoning, cooking just until the garlic becomes fragrant.
Pour in the chicken broth and bring the mixture to a boil.
Add the Rotel and cabbage, stirring to combine.
Reduce the heat and simmer for approximately 15-25 minutes, or until the cabbage reaches your desired tenderness.
During the last 5 minutes of cooking, stir in the black-eyed peas and allow them to heat through.
Serve warm.