How to Make It
Preheat the oven to 450°. Arrange the peppers on a baking sheet and roast for 1 hour, turning occasionally, until tender and charred in spots. Transfer the peppers to a paper bag, close and let cool.
Peel, core and seed the roasted bell peppers, keeping them intact. Cut each pepper in half lengthwise and pat dry with paper towels.
Working over a bowl, press the ricotta through a sieve. Add the snipped chives, season with salt and pepper and stir the tomato into the filling.
Arrange the roasted peppers on a work surface, skinned sides down. Divide the filling evenly between the halves and roll up into thick cylinders. Refrigerate for at least 15 minutes. Cut the cylinders into 3/4-inch-thick slices, transfer to a platter with the cut sides up and serve.