1-First Step: Gather and prep everything
Set out the focaccia, basil pesto, mortadella or ham, salami, sliced fresh mozzarella, roasted pepper, and arugula. If your pesto is homemade, give it a quick stir so it spreads smoothly. Drain the roasted pepper well so extra liquid does not soak the bread.

2-Second Step: Split the focaccia
Use a sharp bread knife to split the focaccia in half lengthwise. Try to keep both halves even so the sandwich stacks neatly. If the bread is extra soft, slice slowly so you do not tear the crumb.

3-Third Step: Spread the pesto
Spread basil pesto on each slice of focaccia. For the best flavor, coat both the top and bottom pieces. This gives you that bold basil taste in every bite and also helps form a little moisture barrier between the bread and the fillings.

4-Fourth Step: Layer the fillings
Place the mortadella, salami, mozzarella, roasted pepper, and arugula on one half of the focaccia. You can layer the ingredients in any order, but it usually helps to place the meat first, then cheese, then vegetables. That way the cheese softens slightly and the greens stay crisp on top.

5-Fifth Step: Press and settle the sandwich
Once everything is in place, close the sandwich gently and press down just enough to help the layers hold together. Do not smash it too hard, or the fillings may slide out. A light press is all you need.

6-Final Step: Slice and serve
Use a sharp knife to cut the sandwich into portions if you want smaller servings. Serve right away while the bread is fresh and the arugula still has its lively bite. This sandwich is best enjoyed soon after assembling, especially if you want that perfect mix of soft bread and crisp greens.