Preheat oven to 350 F. Arrange bread slices on a large baking sheet and brush tops with oil and season with salt and pepper. Bake until golden, about 15-20 minutes, rotating sheet halfway through.
Meanwhile, roast hazelnuts in a pan until golden brown. Add to mini food processor and pulse until roughly chopped. Add goat cheese and honey and pulse until blended. It will be a bit thick so additional mixing with a spatula in a bowl will be necessary.
Once the bread is done, increase the oven temp to 400 F. Combine grapes, rosemary, oil, pinch of salt and pepper on a foil-lined baking sheet and gently toss together. Roast approx 15-20 minutes or until they're slightly wilted and bursting.
Spread a generous layer of hazelnut goat cheese on top of bread. Top with roasted grapes and serve immediately.