Cook potatoes and garlic in boiling water in large saucepan 15 min. or until potatoes are tender.
Meanwhile, brown meat with onions in large skillet; drain. Return to skillet. Stir in corn, water and soup mix; cook 3 min. or until water is absorbed, stirring frequently. Spoon into 8 ramekins.
Drain potatoes; return to pan.
Add cheddar and cream cheese spread; mash until potatoes are smooth and mixture is well blended. Spoon over meat mixture. Make decorative crisscross or crosshatch pattern by lightly dragging fork over potato layer.