1. Line a small cookie sheet with parchment paper.
2. Mix cream cheese, 3 tbsp sugar, and 1/2 tsp vanilla until fluffy. Scoop into 18 portions, flatten into discs, and freeze.
3. Cook strawberries and 1/4 cup sugar in a pot over medium heat for 45 minutes, stirring often. Chill.
4. Preheat oven to 350°F. Line two baking sheets with parchment paper.
5. Whisk flour, baking powder, baking soda, and salt in a bowl.
6. Cream butter and 1 cup sugar until fluffy. Add egg and 2 tsp vanilla, mixing well.
7. Gradually add dry ingredients to form dough. Fold in jam.
8. Scoop dough, place a frozen cheesecake disc inside, and shape into discs. Roll in sugar.
9. Bake for 11-12 minutes. Cool on a rack.