Place the olive oil in a small skillet over medium heat. Once the oil is hot, sauté the onion in the pan until is becomes semi-translucent and just a tad brown around the edges. At this point, put in your red bell pepper and sauté until everything is soft and golden brown in color. This should take about 5 minutes. Set aside to cool.
In a medium bowl, combine all of the remaining ingredients. When the onions and peppers and cool enough to touch, dump those in the bowl as well.
Throughly combine all of the ingredients together with your hands. If the mixture is too wet, add a little more breadcrumbs so that everything will come together.
Shape burgers into 3.5 - 4 ounces a piece (or divide mixture into four equal portions).
Grill until completely done!