Step 1

Combine the gelatin with 2 tablespoons water in a small microwave-safe bowl and set aside to soften, about 5 minutes.

Step 2

Pulse the confectioners' sugar and almond flour in a food processor into a fine powder. Add the cream cheese, lemon zest, vanilla and salt and pulse until smooth and creamy. Scrape out the mixture into a large bowl.

Step 3

Microwave the gelatin until melted, stirring as needed, about 30 seconds. Add the gelatin to the cream cheese mixture and stir thoroughly to combine. Spread out the mixture in a 9-by-13-inch baking dish and refrigerate until set, about 1 hour.

Step 4

Meanwhile, stem each strawberry and quarter lengthwise. Cut each quarter into 5 or 6 chunks.

Step 5

Put the graham cracker crumbs in a shallow bowl. Scoop level tablespoons of the cheesecake and roll into balls (dampen your hands with a little water to help). Coat the bottom half of each ball in crumbs, then press the top center in with your thumb to make an indentation. Put a piece of strawberry in each. Garnish each with a mint leaf if using. Store and serve the thumbprints in mini muffin liners. (These cookies can be refrigerated in an airtight container for up to 3 days.)