Step 1

Combine cheese and pesto in a small bowl. Evenly spread the mixture onto half the bread slices. Top with the remaining bread. Brush both sides of each sandwich with oil. Individually wrap in heavy-duty foil.

Step 2

Prepare a campfire and let it burn down to the coals. Add 2 tomato slices to each sandwich and rewrap in the foil. Cook the sandwiches 4 to 6 inches above the coals, pressing down with a spatula and flipping a few times until the cheese is melted and the bread is crisped, 10 to 15 minutes. Open carefully. Serve hot.