Vegan cheesecake bars with blueberries

Name: Vegan cheesecake bars with blueberries
Prep time: 30 min
Cook time: 45 min
Total time: 1 h 15 min
Cuisine: American
Ingredients: 90 g / scant ½ cup vegan butter*, softened; 65 g / 1/3 cup caster sugar* or coconut sugar; ¼ tsp fine salt; 125 g / 1 cup plain flour or GF flour mix; 50 g / ½ cup almond flour; 200 g / 1½ cups raw cashews, soaked; 120 ml / ½ cup plant milk (I used soya); zest of 1 lemon + 90 ml / 6 tbsp lemon juice; 125 g / ½ cup + 2 tbsp sugar* (I used caster, but coconut sugar will work too); 1 tbsp vanilla paste (optional); 40 g / 3 tbsp vegan butter*, softened; 150 g / 1 heaped cup blueberries*