Make the garlic butter: In a small bowl, mix butter, olive oil, minced garlic, and Italian seasoning. Season with a pinch of salt and pepper.
Prep the rolls: Split the sub rolls but keep them hinged.
Brush the cut sides generously with the garlic butter.
Toast the bread: Place the rolls cut-side up on a baking sheet. Broil on high for 1β3 minutes until golden and fragrant. Watch closely to avoid burning.
Warm the chicken (optional): If you like it warm, toss chicken in a skillet over medium heat for 2β3 minutes.
Add a splash of water or broth if itβs dry. Season with salt and pepper.
Cheese it up: Place a slice of provolone or mozzarella on each toasted roll. Return to the oven for 30β60 seconds to melt.
Toss the salad: In a bowl, mix romaine, Caesar dressing, lemon juice, and half the Parmesan.
Add red pepper flakes if you like a little heat.
Assemble the subs: Layer warm chicken on the cheesy rolls. Top with the Caesar-dressed romaine. Sprinkle remaining Parmesan over the top.
Taste and adjust: Add a drizzle of extra dressing or a squeeze of lemon if needed.
Serve immediately while the bread is still crisp.