Heat a small skillet, add oil, shallot, and cook for a few minutes. Add cauliflower, raisins, salt, and pepper. Cook 3 to 4 minutes longer. Remove from heat and add bacon, mint, and vinaigrette. Toss to combine and stuff the peppers. Transfer stuffed peppers, uncovered, along with the tops, into a small, sprayed baking dish and bake for 20 to 25 minutes. When done, cover peppers with the tops and serve.