Cook, uncovered, in a large skillet wit a lid over low heat for 10 minutes:
1 thick slice bacon, finely diced or 2 tsp olive oil
3/4 cup diced onions
3/4 cup diced carrots
Meanwhile, drop into a large pot of boiling water and cook for 2 minutes:
2 pr 3 large heads lettuce, washed and outer leaves removed. Drain, then cut lengthwise in half. Set the lettuces cut side down over the vegetables and add enough water to come slightly less than halfway up the sides. Season with salt and pepper. Bring to a boil, reduce the heat, cover and simmer for 15 minutes. remove the lettuce with a slotted spoon to a warmed platter. Keep warm. remove the lid and reduce the liquid over high heat to a syrupy sauce. serve immediately.