Prep the peppers: Slice the bell peppers into large flat panels by cutting around the core.
Remove seeds and white pith. Pat dry to help them roast well.
Air fry the peppers: Preheat the air fryer to 400°F (200°C) for 3 minutes. Arrange peppers skin side up in a single layer.
Air fry for 8–12 minutes, until skins blister and char in spots and flesh is tender.
Steam and peel (optional): Transfer hot peppers to a bowl and cover for 5 minutes. The steam loosens the skins. Peel most of the skin off for a silkier texture, or leave some on for smokiness.
Slice: Cut roasted peppers into thin strips.
Add to a bowl with thinly sliced red onion, if using.
Make the quick pickle: In a small bowl, whisk olive oil, red wine vinegar, honey, minced garlic, salt, black pepper, and red pepper flakes. Taste and adjust: add more vinegar for tang, honey for balance, or salt to wake it up.
Toss and rest: Pour dressing over peppers and onions. Toss gently.
Let sit for at least 10 minutes so the flavors meld. This step makes a big difference.
Toast the bread: Brush both sides of the baguette slices with olive oil. Air fry at 360°F (182°C) for 3–5 minutes, flipping once, until golden and crisp at the edges but still tender in the center.
Rub with garlic: While warm, rub one side of each toast lightly with the halved garlic clove.
This adds a subtle, fragrant kick without raw harshness.
Assemble: Spoon the pickled pepper mixture over the toasts, letting a bit of the dressing soak in. Finish with chopped basil or parsley and any extras like capers or crumbled feta.
Serve: Arrange on a platter and serve warm or at room temperature. Spoon a touch more dressing over for shine and flavor.