This is one of my favorite make ahead salads to bring to a barbecue or for entertaining in the summer
Cut peppers and onion into 1/2 inch cubes
Remove and discard fronds and core from fennel, and slice thinly
Combine all ingredients in a large bowl
Adjust seasonings as necessary
Let stand for flavors to combine, or serve immediately
Store covered in refrigerator up to 5 days
*If you do not like fennel, substitute celery
You can serve this right away, but it really tastes best when it sits overnight