1. In a large bowl, toss together bread cubes, 1 cup KELLOGG'S CRISPIX cereal, 1 cup cheese, and Canadian bacon. Divide among six 10-ounce individual casseroles or place all of the mixture in one 2-quart rectangular baking dish.
2. In a medium bowl, whisk milk, eggs, roasted red pepper, basil, and mustard. Pour over bread mixture in casseroles or baking dish. Cover; refrigerate at least 8 hours or up to 24 hours.
3. Toss remaining 1 cup cereal with melted butter, crushing slightly; sprinkle cereal mixture and remaining cheese atop egg mixture. Bake at 350º F, uncovered, 25 to 30 minutes for individual casseroles (40 minutes for 2-quart baking dish) or until evenly puffed and a knife inserted near center comes out clean. Let stand for 5 minutes before serving.