Cut rolls open and toast lightly under broiler or in toaster oven. Smash garlic cloves with side of a knife, place in a small bowl and toss with olive oil to flavor.
Lightly brush insides and ousides of rolls with garlic oil. Place 4 bottom halves in a large, heavy non-stick skillet. Place sliced tomatoes on bread, sprinkle with oregano, then layer with meat and cheese. Top with upper halves. CLose and press together well. Heat skillet over med-high heat. Lower heat and cook about 6 minutes per side, until outside is lightly crisped and cheese is melted. For crisper, thinner sandwiches, flatten with another skillet or a wide-bottomed saucepan as they cook, or use a panini press.