Preheat oven to 350 degrees F
Heat oil in a medium saucepan over medium-low heat
Add tomatoes, bell peppers, and carrots, stirring occasionally until they are softened
Add a dash each of salt plus black pepper as well as paneer (tofu) and mix well.
Remove from heat. Do not overcook. Keep them crunchy.
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Place hot dog buns on the baking pan.
Spread ketchup evenly over buns
Stuff veggies mixture into the buns
Sprinkle the cheese on top.
Transfer to oven and bake until cheese melts and begins to brown.
Remove from oven
Allow to cool slightly.
Drizzle mustard over each hot dog bun.
Serve.