For the Dressing: In a jar, add all ingredients. Close and shake vigorously. Set aside at room temperature.
For the Salad:
- Preheat the oven to 200°C (400°F).
- Spread the bread cubes on a baking sheet.
- Drizzle with olive oil and sprinkle with salt. Toss with hands to coat evenly.
- Bake for about 10 minutes, until golden and crispy. Let cool.
- On a parchment-lined baking sheet, arrange the pancetta slices.
- Bake for 8 to 10 minutes, until crisp. Let cool, then break into bite-sized pieces.
- Slice the Bergeron Le Populaire cheese into 1 cm (½ in) thick slices.
- In a lightly oiled grill pan, grill the cheese slices on both sides. Transfer to a plate.
- In a large mixing bowl, combine the prepared tomatoes, bread cubes, and red onion.
- Add half of the dressing and toss gently. Fold in the grilled cheese slices, then transfer the salad to a serving platter.
- Garnish with crispy pancetta and fresh basil leaves.
- Drizzle the remaining dressing over the salad, followed by a drizzle of balsamic glaze if desired.
- Season with black pepper and serve immediately.
Note: Balsamic glaze (also called balsamic cream) is available in most grocery stores. To make it at home, heat 125 ml (½ cup) balsamic vinegar with 60 ml (¼ cup) brown sugar in a small saucepan. Bring to a boil, stirring, then simmer until reduced by half, about 10 minutes. Let cool and store at room temperature in a sealed container.