1In 10-inch skillet, cook beef over medium-high heat 5 to 7 minutes, stirring frequently, until thoroughly cooked; drain.
2Reduce heat to medium. Add corn and tomatoes to beef in skillet; cook until thoroughly heated and desired consistency, stirring occasionally.
3In small microwavable bowl, microwave cheese cubes and 2 teaspoons water uncovered on High 15 seconds; stir and repeat until cheese is melted and smooth.
4Divide tortilla chips evenly among 6 plates. Top with beef mixture; drizzle with melted cheese. Garnish with chopped fresh cilantro, if desired.