Pre-heat oven broiler. Slice bread into thick slices, generously brush them with olive oil and place them on a cookie sheet. Place bread under broiler and toast until golden.
Cut tomatoes in half. Cut each garlic clove in half and rub each bread slice with the cut side of a garlic clove. Rub toast with tomatoes, squeezing slightly to distribute juice and seeds evenly on bread. Sprinkle with fleur de sel or coarse salt and serve immediately.