Brush the bread with the olive oil. Sprinkle with kosher salt.
Grill the bread for about 2 minutes on each side, until it gets nice light brown grill marks. Watch the bread carefully to make sure it doesn't burn.
Rub the toasted bread with the halved garlic cloves, if desired. Serve plain or top as desired (see above for suggestions).
Notes
You can serve these little toasts as is — honestly, before I even get to topping them, family members and friends usually wander into the kitchen and snap up a piece or two of toast, so it’s smart to make extra. If you choose to rub it with the garlic cloves, you’ll have even more flavorful little nibbles, and then you can consider toppings.