Combine all the marinade ingredients together. Transfer to a large Ziploc bag, then add the chicken, bell peppers, zucchini, and Saputo Feta cheese. Seal and refrigerate for 1 hour, or overnight.
Whisk all the lemon sour cream sauce ingredients together. Transfer to an airtight container and refrigerate for an hour to overnight.
Remove the chicken, bell peppers, zucchini, and Saputo Feta cheese from the marinade (discard the marinade). Thread the chicken, vegetables, and Saputo Feta cheese onto skewers.
Preheat the barbecue on medium-high heat and oil the grate. Grill the skewers until the chicken is done, about 4 minutes per side (8 minutes total). Serve the skewers with the lemon sour cream sauce and steamed rice.