Preheat your oven to 350°F (175°C). Line the baking dish with parchment paper, allowing some to hang over the edges for easy removal later.
In a small saucepan, combine the chopped figs, water, lemon juice, and vanilla extract. Bring to a boil, then reduce the heat and simmer for about 10 minutes until the figs are soft. Remove from heat and allow to cool slightly.
Blend the mixture if you prefer a smoother filling.
In a mixing bowl, combine the rolled oats, flour, brown sugar, salt, and baking powder. Mix well.
Using a fork or your fingers, cut in the softened butter until the mixture resembles coarse crumbs.
Add the egg to the mixture and stir until combined. The dough will be somewhat crumbly.
Press about two-thirds of the dough mixture into the bottom of the prepared baking dish to form the crust.
Spread the fig filling evenly over the crust, leaving a small border around the edges.
Crumble the remaining dough over the fig filling to form a topping.
Bake in the preheated oven for 25 minutes or until the top is golden brown.
Remove from the oven and allow the bars to cool completely in the baking dish. Once cooled, lift the bars out using the parchment paper and cut into squares.