Place potatoes and water in a microwave-safe dish.

Cover and microwave on high for 4 minutes or until tender; drain.

In a large skillet, saute kielbasa and onion in oil until onion is tender.

Add potatoes; saute 3-5 minutes longer or until kielbasa and potatoes are lightly browned.

Combine the brown sugar, vinegar, mustard, thyme and pepper; stir into skillet.

Bring to a boil. Reduce heat; simmer, uncovered, for 2-3 minutes or until heated through.

Add spinach and bacon; cook and stir until spinach is wilted.