Easy Baked Raspberry Oatmeal (Healthy & One-Dish)

0 Prep: Preheat the oven to 350F.
1 Wet Ingredients: Add the thawed raspberries and any additional liquid from them to a 9×13″ (or similar sized) baking dish. Use a fork or potato masher to roughly mash them, then add the yogurt,  non-dairy milk, maple syrup, and vanilla extract to the dish. Mix until combined; the liquid should turn a light pink
2 Dry Ingredients: Add in the oats, flax, baking powder, and salt. Mix well and use a spatula to distribute the mix evenly throughout the pan. Sprinkle the almonds on top, if using.
3 Bake & Serve: Bake in the middle rack of the oven for 35 to 40 minutes, depending on how thick you would like the oatmeal to be. For a “runnier” oatmeal, serve immediately after baking. Otherwise, let the oatmeal cool completely, then slice into bars.  Serve as desired, warm or cold; leftovers will keep in the fridge for up to 5 days or can be pre-sliced and frozen for up to two months.