Preheat oven to 350°F.
Cut the jalapeños into a boat cut. (Click the link above to see how to do a Boat Cut.)
Sprinkle insides of cut jalapeños lightly with salt and pepper, to taste.
Place the jalapeños on a cookie sheet. Place sheet in preheated oven. Cook for about 10 minutes. (Skip this step if you prefer your finished jalapeños to be more raw and crunchy.)
Remove from oven and allow to cool slightly so you can handle them.
Add cream cheese to each jalapeño to cover the bottom, leaving a concave "well" to place other ingredients. (Click the link above to see pictures of this step, if the instructions are unclear to you.) Set jalapeños aside.
Slather insides with honey mustard.
Place as many strips of honey maple ham in each jalapeño as you can fit.
Place jalapeños back on cookie sheet and place back in oven.
Cook, watching closely, until cream cheese is hot and bubbling, about 15 - 20 minutes.
Remove from oven.
Turn oven to broil and allow to preheat.
Place 2 - 3 slices of Muenster cheese on top of each jalapeño.
Place jalapeños back on cookie sheet and place back in the oven.
Broil, watching closely, just until cheese is hot and melted.
Remove from oven.
Sprinkle generously with diced tomatoes. Salt and pepper, to taste.
Serve.