This recipe comes from a 1959 ad for Quaker Oats.
Breakfast in a Glass
1/3 cup cooked oatmeal - cooled
1/3 cup crushed strawberries - fresh or frozen
sugar - to taste
vanilla - to taste
Add 1/3 cup crushed strawberries (fresh or frozen) or other fruit; add sugar to taste and vanilla if desired.
Blend in mixer or blender... or use electric or hand beater until smooth.