Step 1Heat the oven to 350 degrees.
Step 2Heat 3 tablespoons of oil in a large skillet or stew pan. Add the onions and cook over medium heat, stirring occasionally, until they begin to turn golden, 15 minutes; reduce the heat if they brown too fast.
Step 3Add the rice and almonds and stir over low heat to toast them, 5 minutes. Add the currants, tomatoes, mint, allspice, sugar, salt and pepper to taste; cook for 2 minutes. Add the broth and bring to a boil. Cover and cook over low heat until the liquid is absorbed, 12 minutes. Taste and adjust the seasoning; the rice will not be cooked yet.
Step 4Cut a slice off the stem end of each pepper. Reserve the slice, leaving the stem on; carefully remove the core and seeds from inside the pepper. Spoon the stuffing into the peppers and cover with the reserved pepper slices. Stand the peppers in a baking dish in which they just fit. Add 1 1/2 cups hot water to the dish. Sprinkle the peppers with the remaining 2 tablespoons of oil. Cover and bake until the peppers are tender, 1 hour. Serve hot or at room temperature.