Heat olive oil in a large skillet over medium heat, and cook the garlic until softened, about 2 minutes. Lay the chicken breasts into the skillet, and cook until lightly browned, about 5 minutes per side. Pour in the chicken broth, red wine, Italian seasoning, and sun-dried tomatoes; reduce heat to low, and simmer until the chicken is no longer pink inside and the sauce is reduced, 15 to 20 minutes.

Fill a large pot with lightly salted water and bring to a rolling boil over high heat. Once the water is boiling, stir in the spinach fettuccine, and return to a boil. Cook the pasta uncovered, stirring occasionally, until the pasta has cooked through, but is still firm to the bite, about 8 minutes. Drain well in a colander set in the sink. Arrange the fettuccine on a serving platter.

Stir the roasted red peppers and cream into the skillet, and bring just to a simmer. Allow to simmer for about 5 minutes. Remove the chicken breasts, and arrange on the fettuccine. Whisk the flour into the sauce, and simmer until thickened, about 3 more minutes, whisking constantly. Pour sauce over chicken and pasta.