Preheat oven to 350°F.

Place rinsed oat groats in casserole dish.

Add all other ingredients and stir to mix.

Cover tightly with lid or tin foil.

Bake for 2 hours, covered. Most of the liquid will be absorbed by then, but it should not be dry.

Serve warm. May be refrigerated and rewarmed to eat. Chilling will thicken it, so you may need a bit of unsweetened non-dairy milk or water to thin it a bit.

Topping Suggestions 

Fresh or raw berries of any kind.

A few raw or lightly toasted nuts.

Some freshly ground flax, chia, or sesame seeds (or a mix).

A few sunflower or pumpkin seeds.