Cut jalapenos in half lengthwise; remove seeds and center membranes. In a small mixing bowl, combine the cream cheese, cheddar cheese and Cajun seasoning. Stuff about 1 1/2 teaspoonfuls into each pepper half. Cut bacon strips in half widthwise. In a large skillet cook bacon until partially cooked. Wrap a bacon piece around each pepper; secure with a toothpick.
Place on a wire rack in a shallow baking pan. bake uncovered at 350 for 25-30 minutes or until bacon is crisp. Discard the toothpicks and serve immediately.