Preheat the oven to 425 degrees F. Toss the bell peppers, fennel, red onion, 2 tablespoons olive oil, 1/2 teaspoon salt and a few grinds of pepper on a rimmed baking sheet. Bake, stirring occasionally, until the vegetables are tender and lightly browned, about 25 minutes.
Meanwhile, bring a large pot of salted water to a boil. Add the tortellini and cook as the label directs; drain. Put the kale in a large bowl and top with the warm tortellini and roasted vegetables.
Heat the remaining 1/4 cup olive oil in a small skillet over medium heat. Add the garlic and cook, stirring occasionally, until it just starts browning, about 2 minutes. Remove from the heat and add the vinegar; pour over the tortellini mixture and toss to coat. Add the basil and fennel fronds, season with salt and pepper and toss.
Photograph by Ryan Dausch
Courtesy of Food Network Magazine