In a large pot, boil the chicken breasts.  Add the fettuccine noodles to the boiling water.  While noodles are cooking, cut chicken into bite-size peices and return them to the pot.  In another small pot, boil the bell peppers.  Once noodles are tender and chicken is cooked through, drain the water.

Once the peppers are soft, add them to the drained chicken and noodles.  Turn heat to low, and add the diced garlic and pesto sauce.  Add freshly ground pepper to taste.  Stir well.  Let this cook for about ten minutes, and enjoy!