Step 1: Preheat your oven to 350°F (175°C) and grease an 8-inch square baking dish.
Step 2: Place chopped apricots in a bowl and cover with boiling water. Let soak for 10 minutes, then drain any excess liquid.
Step 3: In a large bowl, cream together the softened butter and brown sugar until light and fluffy.
Step 4: Beat in the eggs one at a time, followed by the vanilla extract.
Step 5: Sift the flour and baking powder together, then gradually add to the creamed mixture, alternating with the milk.
Step 6: Gently fold in the soaked apricots and half of the chopped walnuts.
Step 7: Pour the batter into the prepared dish and sprinkle the remaining walnuts on top.
Step 8: Bake for 40-45 minutes or until a skewer inserted comes out clean.
Step 9: While warm, heat the apricot jam and brush it generously over the top to create the sticky glaze.