Ice cream. The partitive form, jäätelöa, is common on menus.
A scoop of ice cream.
An ice cream cone or cornet.
Iced water. The partitive form ´jäävettä´is often seen.
Iceberg lettuce
On the rocks. With ice.
Leg, as in leg of lamb, lampaan jalka.
Desserts. You may see this as a heading on a menu.
"Sweet sauce", usually custard.
Mousse