Preheat oven to 350°F (176°C).: When you step into the kitchen and set the oven, you'll feel the gentle hum begin and notice the air warming, which primes the dish for even baking. Preheating ensures the oats start cooking immediately, creating that tender but set center while the top browns. If the oven is not fully heated, the edges may overbake before the center sets, so always let it reach temperature. Place the rack in the middle position for the most even heat distribution.
Dice strawberries (stems removed) and set aside.: As you chop the strawberries , you'll smell their fresh, fruity aroma and see bright red juices that hint at the pockets of sweetness they'll add. Cutting them into uniform pieces helps them distribute evenly so each bite has some fruit. Avoid cutting them too small, or they may dissolve into the oats and lose their distinct bursts of flavor; conversely, very large chunks might not soften enough during baking.
In a large mixing bowl, combine all wet ingredients. Gently stir to combine.: Pour the plant milk , pure maple syrup , chia seeds , pure vanilla extract , and pure almond extract into a bowl and stir gently. You will notice the chia seeds begin to plump slightly as they meet the liquid, and the mixture takes on a glossy sheen from the syrup. Mixing gently, rather than whipping vigorously, prevents excess air from forming bubbles that could change the texture. A common mistake is overmixing, which can lead to a tougher texture, so aim for just combined.
Add oats and baking powder to the bowl. Stir well.: When you fold in the old-fashioned rolled oats and baking powder , they start absorbing the wet mixture, and you can already see the batter thicken. Stirring well makes sure the leavening is evenly distributed so the bake rises uniformly and avoids dense pockets. If you don't stir long enough, you might find dry bits of oats at the bottom, so scrape the bowl to incorporate everything.
Fold in diced strawberries and almonds. Then pour mixture into an 8 x 8 glass baking dish. Press down lightly with a spoon or spatula to submerge the oats.: Folding in the fruit and almonds gently maintains the texture, letting the berries remain intact instead of turning to mush. As you transfer the mixture to the baking dish, you'll feel a slightly thick, pillowy consistency that spreads easily. Pressing lightly ensures the oats make good contact and the surface is level for even baking. Overpressing can compact the mixture too much and produce a denser final texture, so just a light press is sufficient.
Bake for about 35-40 minutes.: During baking, the kitchen will fill with a warm aroma of maple and fruit, and the edges will begin to transform from pale to a light golden brown. You'll notice tiny bubbles as moisture escapes and the top sets into a tender crust. The internal texture should be custardy and set, not soupy; a clean toothpick inserted near the center should come out mostly clean with a few moist crumbs. If you open the oven too often, heat escapes and baking time may extend, so keep the door closed until you are checking near the end of the time range.
Either serve immediately, or let rest 10-15 minutes to allow the oatmeal to firm/thicken first.: Right after removing the dish you'll feel waves of steam and a comforting smell. Serving immediately gives a warm, spoonable texture, while waiting 10 to 15 minutes firms the bake so that slices hold together better. Resting allows the oats to finish setting and the juices to redistribute. A frequent misstep is trying to slice it while it is still too hot, which can cause a loose, under set center, so be patient for a more attractive presentation.