Mix 2 tablespoon olive oil, balsamic vinegar, salt and pepper and whisk until emulsified.

Halve cherry tomatoes (or cut larger tomatoes in 1/4 inch slices), then brush with vinaigrette. Remove rosemary leaves from stems and sprinkle over the tomatoes.

Roast at 400 F for 15-20 minutes or until tomatoes start to reduce and caramelize. If using larger tomatoes, flip over once and roast a bit longer

Preheat the broiler. Slice baguette and brush with remaining 1 tablespoon of olive oil. Broil briefly until slightly crisp and golden, 2-3 minutes if broiler is preheated..

To serve, arrange toasted baguetttes slices, tomatoes, and cheese on a platter. Let guests assemble their own crostini by topping a slice of bread with goat cheese and tomatoes.