Make the strawberry mix: Hull and chop 1/2 cup fresh strawberries. Lightly mash with a fork to release juices.
Set aside.
Blend the cheesecake base: In a bowl, whisk 1/4 cup softened cream cheese with 1/2 cup Greek yogurt until smooth. Add 1/2–3/4 cup milk, 1 scoop vanilla protein powder, 1/2–1 tablespoon maple syrup, 1/2 teaspoon vanilla, 1–2 teaspoons lemon juice, a pinch of zest, and a pinch of salt. Whisk until silky.
Stir in dry ingredients: Add 1/2 cup rolled oats and 1 teaspoon chia seeds.
Mix well so every oat is coated.
Add the strawberries: Fold in the mashed strawberries and their juices. Taste and adjust sweetness or lemon as needed.
Chill: Transfer to a jar or airtight container. Cover and refrigerate at least 4 hours, but overnight is best for a thick, creamy texture.
Finish and serve: In the morning, stir, then top with extra sliced strawberries.
For a classic touch, crumble 1/2 graham cracker on top right before eating for crunch.