Prep the pan: Line the bottom of a 9-inch springform pan with parchment. Lightly spray the sides with nonstick spray.
Make the shortcake crust: In a bowl, whisk flour, sugar, baking powder, and salt.
Cut in the cold light butter with a fork until sandy and pea-sized bits remain. Stir in milk, vanilla, and lemon zest just until a soft dough forms. If it’s dry, add another teaspoon or two of milk.
Press and bake: Press the dough evenly into the prepared pan.
Use damp fingertips or the bottom of a measuring cup to smooth it. Bake at 350°F (175°C) for 10–12 minutes, until set and lightly golden at the edges. Cool completely.
Bloom the gelatin: Sprinkle gelatin over 1/4 cup cold water in a small bowl.
Let sit 5 minutes to bloom. Microwave for 10–15 seconds until liquefied, then cool slightly. It should be fluid but not hot.
Beat the filling: With a hand or stand mixer, beat cream cheese until very smooth.
Add Greek yogurt, powdered sweetener, vanilla, and lemon juice. Beat until creamy, scraping down the bowl.
Incorporate gelatin: With the mixer on low, slowly stream in the gelatin mixture. Beat just to combine.
Taste and adjust sweetness if needed.
Fill and chill: Pour the filling over the cooled crust and smooth the top. Tap the pan gently on the counter to release air bubbles. Chill at least 4 hours, or overnight, until set.
Macerate the strawberries: Toss sliced strawberries with sugar and lemon juice.
Let sit 15–20 minutes to release juices. For a light glaze, stir cornstarch into 1 tablespoon water, then fold into the berries. Microwave 20–30 seconds to slightly thicken, then cool.
Top and serve: Run a thin knife around the pan edge and release the springform.
Spoon strawberries and their juices over the cheesecake. Add light whipped topping, zest, or mint if you like. Slice with a sharp knife, wiping between cuts for clean slices.