1. Heat a 12-inch nonstick skillet over medium-high heat; add 2 teaspoons of the canola oil. Season the chicken with the salt and black pepper; add to the pan. Cook 2 to 3 minutes to sear. Turn and cook 2 minutes more. Transfer to a plate and tent with foil to keep warm.
2. Add remaining oil and the bell peppers and onion to skillet. Saute, stirring occasionally, until softened, 6 to 8 minutes. Add the garlic and paprika; saute until fragrant, about 1 minute. Add the wine and cook, stirring frequently, until nearly evaporated, about 2 minutes. Add the tomatoes and chicken broth and bring to a simmer.
3. Return chicken to skillet, reduce heat to medium low and simmer until chicken is just cooked through, 2 to 3 minutes.
4. In a small dish, whisk the flour into the sour cream. Slowly add to the sauce and simmer 3 minutes more. Stir in the dill and lemon juice and season to taste with additional salt and black pepper. Serve chicken and sauce over whole-wheat orzo if desired.