On a large sheet pan or silicone baking mat, place flatbread. Spread ranch dressing over flatbread.
Then add shredded ham. Layer onions and peppers on top of ham. Generously sprinkle mozzarella cheese over vegetables and meat.
Place in preheated oven and cook for 10 to 15 minutes or until cheese has melted. Remove from oven and slice into 4 equal sized pieces and serve while hot.
The calories listed are an approximation based on the ingredients and a serving size of 2 slices of the ham flatbread. Actual calories will vary. It can be stored in sealed container and stored in a refrigerator for up to 3 days.