Slice the bread lengthwise with a serrated knife. Dig out the inside of the bread on both sides. Try to leave enough crust as to keep the sandwich sturdy. Save the bread dug out and make croutons or bread crumbs with it. Optional - brush on a bit of olive oil, no more than 1 Tbs., on the insides of the bread. Be careful here, the bread can get soggy.. so only this if you love a bit more olive oil (I brush it on mine).
Spread the garlic on both sides of the bread. It will be thin. Spread the tapenade on both sides of the bread. Yes, all of it. Press as you spread.
On the bottom side of bread, layer in the following order: 3 slices of eggplant, artichoke, bell pepper, 3 slices of eggplant, a pinch of salt and a few grinds of pepper, pepperoncini, chard or spinach and optional cheese. Place top on sandwich and gently press down.
Tightly wrap the sandwich three times to ensure nothing leaks out and place it in the fridge. Place a heavy object on top of the sandwich, such as cast iron skillet, or box of wine. Let marinate and press for at least 3 hours or overnight.
Cut into 2" wide pieces and then cut in 1/2 for a smaller sandwich. I yield 5, 2" wide (5cm) pieces, but cut the center cuts in half to make smaller sandwiches. Cut to your needs.
Although a fresh sandwich is best, rewrap any remaining pieces tightly in plastic wrap and store for up to two days (the bread will get soggy as it sets).