In bowl of food processor combine tomato, basil, cheese, nuts, oil, garlic and pepper. Process to form a fine paste. Season with salt. Scrape into a bowl, cover and refrigerate until ready. Bring to room temperature. Trim the white crust from the Brie and cover the top of the cheese with the herb mixture. Place Brie on a baking sheet and bake at 375 degrees oven for about 5 minutes until the cheese is beginning to melt. Transfer to serving plate and surround with crackers. Serve immediately.