You will need:
Baby spinach & rocket
Salt & pepper to taste
Make nice slices of your bread, about half to one centimeter. Toast or grill the slices for a few minutes, until browning around the edges. Rub the garlic clove around the browned edges and drizzle with olive oil. Layer a little herb (basil or dill, for example), a leaf (baby spinach or rocket or both), a thin slice of tomato and a slice or two of soft cheese (bocconcini or mozzarella). Grill some more until cheese is melting. It takes less than ten minutes, including grill time.
And as you can see, you can subsidise anything for just about anything - for example, a sourdough loaf is perfect. Add some ham or prosciutto, or pesto or sundried tomatoes or olives for a nice change.
Seriously. Best. Snackythings. Ever.