Preheat the oven to 425°. In a skillet, heat the 2 tablespoons of oil. Add the onion, bell pepper, fennel and garlic and cook over moderately high heat, stirring, until tender, 6 minutes. Add the tomatoes and crushed red pepper and cook, mashing, until thickened, 5 minutes. Season with salt and black pepper. Remove from the heat; let cool slightly. Stir in the shrimp, parsley and dill.