A muffaletta is a sub-style sandwich stuffed into a round loaf. Typically it’s loaded with deli meat, but this version takes advantage of fresh summer tomatoes, sweet roasted peppers, marinated artichokes, and loads of kale. The secret to the sandwich is the olive spread: this is the main flavour base so it needs to pack big, bold flavour. For best results, use a mix of black and green olives with a hint of garlic.