Cut the top side off the tomatoes and discard.
Grate the flesh side of the tomatoes on the largest holes of a box grater over a bowl. The tomato will grate into pulp and juice, leaving the skin behind. Discard the tomato skin.
Pour the grated tomato mixture into a fine-mesh sieve set over another bowl and gently press to drain some of the excess liquid.
Transfer the thicker tomato pulp to a bowl and season with sea salt and freshly cracked black pepper to taste.
Once the bread is out of the broiler and still warm, rub the cut side of each slice with 2-3 peeled garlic cloves, adjusting the intensity as desired.
Spoon the seasoned, drained tomato mixture generously over the garlic-rubbed bread.
Drizzle with olive oil and garnish with freshly chopped basil.
Serve immediately for the best flavor and texture.