Preheat your oven to 350°F (175°C). Line a baking sheet with parchment paper.
In a mixing bowl, combine flour, sugar, baking powder, and salt.
In another bowl, beat the eggs and vanilla extract together. Gradually add to the dry ingredients, mixing until combined.
Fold in the toasted and chopped almonds.
Divide the dough in half and shape each half into a log about 12 inches long. Place the logs on the prepared baking sheet and flatten them slightly.
Bake for 25-30 minutes, or until the logs are golden brown. Remove from the oven and let cool for 10 minutes.
Reduce the oven temperature to 325°F (165°C). Using a serrated knife, cut the logs into ½-inch slices. Place the slices cut-side down on the baking sheet and bake for another 10-15 minutes, or until crisp.
Let the biscotti cool completely on a wire rack.
In a double boiler, melt the chocolate chips with the vegetable oil until smooth. Dip one end of each biscotti into the melted chocolate and place on parchment paper to set.