Italian Chicken Sandwich on Focaccia

Amounts will vary with how many sandwiches you need-this is for 1 sandwich.
1 piece focaccia bread {5x3 inch} split
1 T. mayo
2 oz. grilled chicken
2 slices salami
1 slice provolone cheese
1/4 c. roasted yellow pepper strips
1/4 c. baby spinach
2 slices red onion
Pound chicken pretty thin, season and grill-let rest. Roast peppers, slice and set aside. Slice onion and ready focaccia bread for sandwiches. Slice chicken into strips.
Assemble in order given above.