INGREDIENTS 3   bell peppers 1 large onion 1 tbsp (15 mL) olive oil 1½ lbs (750 g) chicken tenderloins 1 tbsp (15 mL) Three Onion Rub 1 tbsp (15 mL) Garlic Rub 1 pkg (8 oz. / 250 g) white button mushrooms 2–3   garlic cloves 1 jar (24 oz. or 650 mL) marinara sauce …