Preheat oven to 375 degrees F. Lightly oil a baking sheet or coat with nonstick spray.
In a small bowl, combine butter, Dijon and relish; season with salt and pepper, to taste. Spread mixture on top half of dinner rolls; set aside.
Place bottom half of dinner rolls onto the prepared baking sheet. Top with ham, cheese and top of dinner rolls. Brush tops of dinner rolls with butter; sprinkle with poppy seeds.
Place into oven and bake until golden brown and toasted, about 15-18 minutes. Let stand 5 minutes.