Pear and carob tart

Name: Pear and carob tart
Ingredients: 1.5 cup + 1 Tbsp (180g) tigernut flour; 1/2 cup + 1/3 cup + 1 tsp (140g) arrowroot (see notes below for substitutions); 1 tsp cinnamon; 4 Tbsp extra virgin olive oil; 1 Tbsp maple syrup; 1/2 cup (125 ml) water; Pinch of salt; For the carob and pear filling; 4 ripe pears; 2 cups (500 ml) hot water; 3/4 cup + 2 tsp (90 g) carob powder; 4 Tbsp arrowroot; Optional : a dash of maple syrup