Cut chicken into bite sized pieces. Season liberally with salt and pepper and toss in a bowl with flour to coat.
Heat oil over medium-high heat, in large skillet. Add chicken and cook until browned. Turn chicken over and brown other size. Remove chicken from pan and set aside on plate.
Return pan to heat and add onion and pepper. Cook until just beginning to soften, stirring occasionally. Add garlic and cook 1 minute more.
Add the wine to pan and cook until reduced by about half.
To pan, add tomatoes, broth capers, Italian seasoning and chicken. Bring just to a boil and then knock heat down to medium-low. Simmer 20-25 minutes.
Serve over pasta.