And when the children of Israel saw it, many said one to another, It is manna! ... And Moses said unto them, This is the bread which the Lord hath given you to eat. -- Exodus, 16:15 There's a big pile of bread at the Portland Public Market in southern Maine. These aren't plastic-wrapped, sandwich-slice loaves; these are round loaves with hard crusts -- tan and black, springy and crunchy. There's apple cranberry, roasted red pepper, multigrain, rye, olive, Italian, organic whole wheat. The Italian bread is light, a perfect companion for sweet butter and jam; the whole wheat bread …