Preheat the oven to 350F. Lightly grease a 9x13-inch baking dish. You can also line the bottom with parchment paper for extra insurance, but it’s not necessary!
In a large microwavable bowl, add the butter and microwave it until just melted. Whisk in the milk, lemon zest and juice, vanilla, and eggs until smooth.
Add the oats, almond flour, nuts (if using), chia seeds, sugar, baking powder, and salt. Use a rubber spatula to mix until thoroughly combined. Stir in the strawberries.
Transfer to the prepared baking dish and spread into an even compact layer. Sprinkle a bit more coconut sugar over top. Bake for 45-50 minutes, or until starting to turn golden on the edges. You can pop it under the broiler on high for a couple of minutes to get a nice browning on top if you’d like.
Let cool for at least 10 minutes before slicing (30 minutes would be best to let it firm up a bit).
Serve topped with whipped yogurt and more chopped strawberries if you have some.