Step 1

Preheat broiler to high. Arrange tortilla chips on a nonstick baking sheet in a single layer but close together; set aside.

Step 2

Coat a large nonstick skillet with cooking spray; heat over medium heat. Add beef and cook until browned, breaking up meat as it cooks, about 3 to 4 minutes. Season with oregano and salt; stir in tomatoes and beans. Cook until heated through, stirring occasionally, about 3 to 5 minutes.

Step 3

Spoon beef mixture over chips; sprinkle with cheese. Broil until cheese melts, about 30 seconds to 1 minute. Remove from broiler; sprinkle with scallions and jalapenos. Yields 4 chips with toppings per serving.