01 - Whisk together balsamic vinegar, olive oil, minced garlic, Dijon mustard, salt, and pepper in a small bowl. Place the steak in a zip-top bag or shallow dish, pour the marinade over, and refrigerate for at least 20 minutes, up to 2 hours for deeper flavor.
02 - Brush corn ears with olive oil and heat a grill or grill pan to medium-high. Grill corn for 8 to 10 minutes, turning occasionally, until lightly charred. Let cool, then cut kernels from the cob.
03 - Remove steak from the marinade and grill to desired doneness, about 3 to 4 minutes per side for medium-rare. Rest for 5 minutes, then slice thinly across the grain.
04 - Combine salad greens, grilled corn kernels, cherry tomatoes, red onion, avocado, and crumbled Gorgonzola in a large bowl.
05 - Whisk together balsamic vinegar, extra-virgin olive oil, honey, Dijon mustard, salt, and pepper until fully emulsified.
06 - Drizzle the vinaigrette over the salad, arrange sliced steak on top, and serve immediately.