For Roasted Tomato Slices:
Pre-heat oven to 375°F degrees
While oven heats, slice tomatoes about a half an inch thick
Place tomato slices on a baking sheet (lined with a baking mat or greased).
Drizzle tomato slices with olive oil and sprinkle them with coarse salt and pepper.
If available, take a few fresh thyme and rosemary leaves and sprinkle them onto the slices.
Bake in the oven until the skin around the sides of the slices starts to wrinkle and lightly brown, about 45 to 55 minutes.
For Crostini:
While the sliced tomatoes roast up in the oven, take your bread of choice such as baguette (I used homemade artisan bread that I baked) and slice it about a half an inch to an inch thick and place on a baking sheet.
Brush the bread slices with olive oil and sprinkle them lightly with a little garlic powder and paprika.
Bake in the oven until gold brown and lightly toasted about 7 to 10 minutes.
Assemble Crostini:
Place one or two tomato roasted tomato slices on each crostini. Top with ground parmesan cheese and drizzle with balsamic reduction. Serve right away.