Preheat your oven to 400 degrees.

Place the focaccia on a baking sheet and toast it in the oven for 5-8 minutes until warm and slightly crisp on the edges.

In a small bowl, mix the pesto and mayonnaise together until smooth—this is your flavorful pesto mayo.

Using a serrated knife, slice the focaccia horizontally through the center without flipping the top layer (to keep the crumbs intact).

Set the top piece aside gently, keeping it flat.

Spread a generous layer of pesto mayo on the bottom half of the bread.

Layer on the turkey, followed by the tomato slices, greens, and thinly-sliced red onion.

Add dollops of pesto mayo directly on top of the greens to reduce mess while assembling.

Carefully place the top layer of focaccia back onto the sandwich and lightly press down.

Using a sharp knife, cut the sandwich into six equal wedges. Serve and enjoy!