Heat a large skillet over medium-high heat then spray with nonstick spray. Season both sides of chicken breasts with garlic salt and pepper then saute for 3-4 minutes per side or until cooked through. Remove to a plate then tent a piece of foil on top to keep chicken warm.
Turn heat down to medium then add 1 Tablespoon butter and extra virgin olive oil. Add red onion and peppers, season with salt and pepper, then saute for 3 minutes. Turn heat up to medium-high then add remaining 1 Tablespoon butter, zucchini, and sweet corn kernels, season with more salt and pepper, then saute for another 3 minutes, or until vegetables are crisp tender. Add garlic then saute for 1 minute.
Add balsamic vinegar then saute until absorbed, 1 minute. Remove skillet from heat then stir in fresh basil. Taste then add salt and pepper if necessary, and then plate the chicken topped with succotash.
Notes
Feel free to grill the chicken vs saute it.
For an extra layer of flavor, char the corn on the grill before removing the kernels.
Serve chicken and succotash over cooked white, brown, or wild blend rice, as shown in these photos.