Preheat oven to 175°C / 350°F. Line a 9×13 pan with parchment and grease the sides.
Toss 300 g strawberries with 30 g erythritol; set aside to macerate 10 minutes.
Beat 226 g cream cheese with 20 g erythritol and 1 egg yolk until smooth; set aside.
Whisk dry: 200 g almond flour + 20 g coconut flour + 1 tsp baking powder + 1/4 tsp salt.
Whisk wet: 4 eggs + 80 g erythritol until slightly thick, then add 100 g melted butter + 1 tsp vanilla.
Fold dry into wet until just combined; add 1 tbsp almond milk if batter is too stiff.
Spread half the batter in the pan. Drop cream-cheese dollops (1–2 tbsp each) evenly. Scatter half the strawberries. Spoon remaining batter around in patches, then finish with remaining cream cheese dollops and strawberries (don’t fully cover — pockets create the earthquake).
Bake 35–40 minutes until edges are golden and a toothpick shows a few moist crumbs. Tent with foil if browning too fast.
Cool 20 minutes in pan, then lift out and cool slightly more. Optional: whip 100 g heavy cream + 10 g erythritol and serve on slices. Slice into 12 and enjoy.