Combine 3 tablespoons of the flour, salt and a few grinds of black pepper in a shallow dish. Add the pork cubes and toss to coat thoroughly.

Heat the butter and 1 tablespoon of the olive oil in a large skillet over medium-high heat. Add the pork and cook, turning with tongs, until lightly browned on all sides, 2 minutes. Add the wine and continue cooking, turning the meat frequently, until the liquid is almost evaporated, 1-1/2 to 2 minutes longer. Transfer the pork to a plate and set aside.

Add the remaining tablespoon of olive oil to the pan and add the onion. Cook until soft and translucent, 2 to 3 minutes. Add the red bell pepper, the remaining 1/2 tablespoon of flour and paprika and toss to coat thoroughly. Season with salt and pepper. Continue cooking, stirring frequently, until the flour coating is pale golden in color, 3 minutes longer.

In a small bowl, whisk together the chicken broth and sour cream. Add to the onion-pepper mixture and combine well. Bring to a rapid simmer and cook for 1 minute, stirring frequently, just until the liquid starts to thicken. Return the pork to the pan and combine with the sauce. Continue cooking until the liquid has thickened to a gravy consistency and the pork is barely pink in the middle.

To serve, spoon about 1/4 cup of the gravy over the egg noodles and divide them between 4 plates. Top each with a portion of the pork mixture, then spoon the remaining gravy over the top of each serving.