01 -
In a small bowl, whisk together olive oil, minced garlic, Dijon mustard, salt, and pepper until combined.
02 -
Place the flank steak in a resealable bag, pour the marinade over it, seal, and refrigerate for 1 to 4 hours to infuse flavors.
03 -
Heat the grill to medium-high temperature to ensure even cooking.
04 -
Cook the steak on the grill for 5 to 7 minutes per side, depending on desired doneness. Use a meat thermometer to verify internal temperature.
05 -
Allow the steak to rest for 5 minutes to retain juices, then slice thinly against the grain for optimal tenderness.
06 -
Combine halved cherry tomatoes, mozzarella balls, and chopped basil leaves in a small bowl.
07 -
Arrange steak slices on a serving platter, top with the Caprese mixture, drizzle with balsamic glaze, and serve immediately.