Spread goat cheese on 1 side of 3 bread slices. Spread pepper jelly on 1 side of remaining bread slices; layer with strawberries, basil leaves, and watercress. Sprinkle with salt and pepper to taste. Top with remaining bread, goat cheese sides down. Cook sandwiches in a large, lightly greased nonstick skillet over medium heat 2 to 3 minutes on each side or until golden brown.