"Tamal en cazuela is our ultimate comfort food," insists Acela Matamoros, one of Cuba's top cooking teachers and food historians. A kind of Cuban polenta -- or a stove-top tamal -- at its most basic, tamal en cazuela can be just a soft mush of water, cornmeal, and salt, sometimes eaten with milk and a sprinkle of sugar. Other versions use grated corn or the strained "milk" of the corn puree, which thickens when cooked. The flavorings range from classic pork, such as here, to chicken to seafood. This recipe, using pork ribs and a combination of grated corn and some cornmeal to thicken it, is easy and fairly quick but delivers plenty of that comforting, grandmotherly flavor.