In a 10-inch frying pan over medium-high heat, heat the olive oil and brown the pork, breaking it up with a wooden spoon while it cooks. Add the garlic and onions and sauté until fragrant but not browned. Add the tomato paste, tomatoes, chili powder, salt, cinnamon, cumin, cloves, and red pepper flakes. Stir to combine. Add the bell peppers and the raisins. Stir to combine.