Note: Depending on your region or access, the "boudin" or "cajun" sauage you're able to find could be raw or pre-cooked. Check the package directions to ensure which type you have. If you have cooked sausage, you can move on to the next step (there's no need to cook it again first). If you have raw sausage, it should be cooked before moving forward. If you're unsure how to cook sausage, check out this guide.
Preheat oven to 350 degrees F. Spray a 9x5 baking dish (or similar size - should be able to hold 1 quart) with cooking spray, then set aside.
Prepare sausage by removing casing and crumbling into small pieces (should be 1/2 inch or less in size). Tip: for best results, use your hands to crumble sausage; this way you can feel any remaining pieces of casing or other undesirable parts and remove them. Once crumbled, set sausage aside.