Add all oatmeal ingredients to a large container with an airtight lid and stir well. Seal and place in the refrigerator overnight (or at least 6 hours).
Divide the oats between four bowls and pile each with strawberries, pepitas, and almonds. Add additional almond milk or coconut milk if desired.
For the hot version:
Add the oats, chia seeds, coconut, maple syrup, coconut milk, and almond milk to a medium-sized pot. Bring to a full boil over medium-high heat, then reduce heat and simmer for 15 to 20 minutes, stirring occasionally, until oatmeal has thickened and the liquid has been absorbed. Remove from heat and stir in vanilla extract. Divide between four bowls and top with strawberries, almonds, and nuts, along with additional almond and/or coconut milk, if desired.
Prep and cook times are for the hot version of the recipe. Allow for at least 6 hours for the cold (overnight) variation.