Preheat oven to 425 degrees F.
Place tomatoes and squash onto a baking sheet and toss with oil, vinegar, maple syrup, garlic, pepper, rosemary, thyme, salt and pepper.
Bake in preheated oven for 20 to 30 minutes, mixing every 10 minutes, until squash is tender.
Remove from oven and toss in walnuts. Cover and set aside to cool slightly while polenta is baking.
Heat oven broiler to high
Cut polenta into ½ inch discs and brush both sides with olive oil.
Place discs on a greased baking sheet and broil for 7 to 10 minutes or until slightly browned.
Remove from oven and spread with goat cheese. Top with bruschetta mixture and garnish with more chopped herbs and walnuts, if desired.
Enjoy immediately!