Preheat oven to 375°F. Line a 9-inch square metal baking pan with parchment paper or lightly grease or coat with nonstick cooking spray.
In a small bowl, combine the almond milk and lemon juice. Let stand 5 minutes to thicken (mixture will curdle which is normal).
In a large bowl, whisk the chickpea flour, baking powder, baking soda, cinnamon, ginger, nutmeg, and salt. Make a well in center of flour mixture.
In a small bowl, whisk the sugar, oil, milk, and vanilla until well blended. Add wet mixture to the flour mixture, stirring just until moist. Spread evenly into prepared pan, smoothing top.
Bake in the preheated oven for 18 to 22 minutes or until a wooden pick inserted in the center comes out clean. Cool cake in the pan 10 minutes on wire rack; remove from pan. Cool completely on wire rack.
Drizzle each slice of cake with salted caramel sauce