Small vegetables are not just for small gardens. They are, in fact, for all who enjoy exceptional eating. Little fingerling potatoes have a texture and flavor unmatched by any larger roots; slender, diminutive French beans simply melt in the mouth; and these tiny lettuce heads, maxing out at about 8 inches in diameter, all deliver delicate texture and sweetness rarely seen in giant heads. They are also charming in the garden: their compact, tidy form contributes an air of formality and neatness, especially when laid out in a grid. Harvested as mature heads, they can be turned into stunning salad by cutting them into wedges--or even halves--and allowing their intact beauty to shine through.