Scrub potatoes.
Cook in boiling salted water to cover 20 minutes or until tender; drain well, and cool.
Peel and thinly slice potatoes; place in a shallow container.
Combine oil, juice, garlic,...
Saute onion in butter in a small Dutch oven until tender.
Add remaining ingredients, stirring well.
Cover and cook over medium heat 15 minutes or until all vegetables are tender.