Grill the Corn: Preheat the grill or grill pan to medium-high. Brush the corn with olive oil and grill for 10-15 minutes, turning occasionally, until charred. Let cool, then cut the kernels off the cobs.
Toast the Bread: Preheat the oven to 375°F / 190°C (170°C fan-assisted). Toss ciabatta cubes with a little olive oil, salt, and pepper. Spread on a baking sheet and toast for about 10 minutes, until golden and crispy. Note: Keep a close eye on them towards the end to prevent burning. Let cool.
Assemble the Salad: In a large bowl, combine the grilled corn, toasted bread, cherry tomatoes, cucumber, red pepper, onion, and basil.
Make the Vinaigrette: Whisk together olive oil, red wine vinegar, garlic, Dijon mustard, salt, and pepper in a small bowl.
Dress and Serve: Pour the vinaigrette over the salad and toss to coat. Let sit for 15-20 minutes to absorb flavours. Top with crumbled feta, if using, and serve at room temperature. Enjoy!
For a relaxing atmosphere in the kitchen I recommend my personal Elle Republic: Chilled Out Kitchen Tunes Playlist on Spotify.